The vice president’s two formal duties include determining whether the president is disabled and

The Vice President of the United States, also knowns as VPOTUS or Veep, is an important position in the executive branch of federal government. The Vice President is probably best known as being “a heartbeat away from the presidency”, meaning that if a sitting President dies or is impeached, the Vice President takes over. However, constitutionally, the main responsibility of the Vice President is the role of President of the Senate. Under Article One, Section Three of the US constitution:

“The Vice President of the United States shall be President of the Senate, but shall have no Vote, unless they be equally divided.”

As head of the upper house of congress, the Vice President votes on legislation or other motions only when Senators are deadlocked 50-50. This has occurred 243 times and involved 35 different Vice Presidents. Whilst in the past the Vice President would actively preside over Senate proceedings, nowadays its customary that they only get involved in order to break a tie.

The only other formally recognized duty of the Vice President is to preside over and certify the tally of electoral college votes after a Presidential election has taken place.

Informal Roles of the US Vice President

However, the role also brings with it many visible, informal responsibilities. These would typically vary depending upon the relationship between the President and Veep of the day, but have typically included:

  • Making public appearances representing the President
  • Performing ceremonial duties in place of the President
  • Acting as an adviser to the President
  • Meeting with heads of state or government of other countries

Selection of the Vice President

Potential US Vice Presidents must fulfill the following criteria by being:

  • a natural born US citizen
  • at least 35 years old
  • a US resident for at least the previous 14 years

Other than this, vice presidential candidates don't require any special qualifications. In practice, however, most candidates have served in Congress, and some have been high ranking military officers or state Governors.

Vice presidential candidates run together with presidential candidates in an election on a "joint ticket" as a "running mate". This means that once the vice presidential candidate for each party has been confirmed, voters are then essentially selecting the President and Vice President as a single package. In theory, vice presidential candidates are selected at National Conventions by the party as a whole once the Presidential candidate has been announced. In reality, however, standard practice has been that Presidential candidates effectively choose their own running mates.

The first US Vice President was John Adams, serving from 1789 to 1797. The current office holder is Mike Pence. 

See also: Executive Branch, US Senate, US Presidential Election


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The Constitution names the vice president of the United States as the president of the Senate. In addition to serving as presiding officer, the vice president has the sole power to break a tie vote in the Senate and formally presides over the receiving and counting of electoral ballots cast in presidential elections.

Today vice presidents serve as principal advisors to the president, but from 1789 until the 1950s their primary duty was to preside over the Senate. Since the 1830s, vice presidents have occupied offices near the Senate Chamber. Over the course of the nation’s history, the vice president’s influence evolved as vice presidents and senators experimented with, and at times vigorously debated, the role to be played by this constitutional officer.

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Learn about the presidential election process, including the Electoral College, caucuses and primaries, and the national conventions.

In other U.S. elections, candidates are elected directly by popular vote. But the president and vice president are not elected directly by citizens. Instead, they’re chosen by “electors” through a process called the Electoral College.

The process of using electors comes from the Constitution. It was a compromise between a popular vote by citizens and a vote in Congress.     

The Electors

Each state gets as many electors as it has members of Congress (House and Senate). Including Washington, D.C.’s three electors, there are currently 538 electors in all.

Each state’s political parties choose their own slate of potential electors. Who is chosen to be an elector, how, and when varies by state.

How Does the Electoral College Process Work?

After you cast your ballot for president, your vote goes to a statewide tally. In 48 states and Washington, D.C., the winner gets all the electoral votes for that state. Maine and Nebraska assign their electors using a proportional system.

A candidate needs the vote of at least 270 electors—more than half of all electors—to win the presidential election.

In most cases, a projected winner is announced on election night in November after you vote. But the actual Electoral College vote takes place in mid-December when the electors meet in their states. See the Electoral College timeline of events for the 2020 election.

While the Constitution doesn’t require electors to vote for the candidate chosen by their state's popular vote, some states do. The rare elector who votes for someone else may be fined, disqualified and replaced by a substitute elector, or potentially even prosecuted.  

Special Situations

Winning the Popular Vote but Losing the Election

It is possible to win the Electoral College but lose the popular vote.  This happened in 2016, in 2000, and three times in the 1800s.

What Happens if No Candidate Wins the Majority of Electoral Votes?

If no candidate receives the majority of electoral votes, the vote goes to the House of Representatives. House members choose the new president from among the top three candidates. The Senate elects the vice president from the remaining top two candidates.

This has only happened once. In 1824, the House of Representatives elected John Quincy Adams as president.

How to Change the Electoral College

The Electoral College process is in the U.S. Constitution. It would take a constitutional amendment to change the process. For more information, contact your U.S. senator or your U.S. representative.

Explains the presidential election process from beginning to end.

  • Show the Video Transcript

    The Requirements

    Lots of people dream of becoming President of the United States. But to officially run for office, a person needs to meet three basic requirements established by the U.S. Constitution (Article 2, Section 1).

    A Presidential candidate must be:

    • A natural born citizen (U.S. citizen from birth)
    • At least 35 years old and
    • A U.S. resident (permanently lives in the U.S.) for at least 14 years

    Step 1: Primaries and Caucuses

    People with similar ideas usually belong to the same political party. The two main parties in the U.S. are Republican and Democrat.

    Many people want to be President. They campaign around the country and compete to try to win their party’s nomination.

    In caucuses, party members meet, discuss, and vote for who they think would be the best party candidate.

    In primaries, party members vote in a state election for the candidate they want to represent them in the general election.

    Step 2: National Conventions and General Election

    After the primaries and caucuses, each major party, Democrat and Republican, holds a national convention to select a Presidential nominee.

    The party’s Presidential nominee announces his or her choice for Vice President.

    The Presidential candidates campaign throughout the country to win the support of the general population.

    On election day, people in every state cast their vote .

    Step 3: The Electoral College

    When people cast their vote, they are actually voting for a group of people called electors.

    The number of electors each state gets is equal to its total number of Senators and Representatives in Congress. A total of 538 electors form the Electoral College.

    Each elector casts one vote following the general election. The candidate who gets 270 votes or more wins.

    The newly elected President and Vice President are then inaugurated on January 20th.

An election for president of the United States happens every four years on the first Tuesday after the first Monday in November. The most recent presidential election was November 3, 2020.

Primaries, Caucuses, and Political Conventions

The election process begins with primary elections and caucuses. These are two methods that states use to select a potential presidential nominee

The vice president’s two formal duties include determining whether the president is disabled and
Nominee: the final candidate chosen by a party to represent them in an election.. In general, primaries use secret ballots for voting. Caucuses are local gatherings of voters who vote at the end of the meeting for a particular candidate. Then it moves to nominating conventions, during which political parties each select a nominee to unite behind. During a political party convention, each presidential nominee also announces a vice presidential running mate. The candidates then campaign across the country to explain their views and plans to voters. They may also participate in debates with candidates from other parties.

What is the Role of the Electoral College?

During the general election

The vice president’s two formal duties include determining whether the president is disabled and
General Election: a final election for a political office with a limited list of candidates. , Americans go to their polling place
The vice president’s two formal duties include determining whether the president is disabled and
Polling Place: the location in which you cast your vote.
to cast their vote for president. But the tally of those votes—the popular vote—does not determine the winner. Instead, presidential elections use the Electoral College. To win the election, a candidate must receive a majority of electoral votes. In the event no candidate receives a majority, the House of Representatives chooses the president and the Senate chooses the vice president.

What is a Typical Presidential Election Cycle?

The presidential election process follows a typical cycle:

  • Spring of the year before an election – Candidates announce their intentions to run.

  • Summer of the year before an election through spring of the election year – Primary and caucus

    The vice president’s two formal duties include determining whether the president is disabled and
    Caucus: a statewide meeting held by members of a political party to choose a presidential candidate to support. debates take place.

  • January to June of election year – States and parties hold primaries

    The vice president’s two formal duties include determining whether the president is disabled and
    Primary: an election held to determine which of a party's candidates will receive that party's nomination and be their sole candidate later in the general election. and caucuses.

  • July to early September – Parties hold nominating conventions to choose their candidates.

  • September and October – Candidates participate in presidential debates.

  • Early November – Election Day

  • December – Electors

    The vice president’s two formal duties include determining whether the president is disabled and
    Elector: a person who is certified to represent their state's vote in the Electoral College. cast their votes in the Electoral College.

  • Early January of the next calendar year – Congress counts the electoral votes.

  • January 20 – Inauguration Day

Before the general election, most candidates for president go through a series of state primaries and caucuses. Though primaries and caucuses are run differently, they both serve the same purpose. They let the states choose the major political parties’ nominees for the general election.

State Primaries and Caucuses for the Presidential Elections

  • State primaries are run by state and local governments. Voting happens through secret ballot.

  • Caucuses are private meetings run by political parties. They’re held at the county, district, or precinct level. In most, participants divide themselves into groups according to the candidate they support. Undecided voters form their own group. Each group gives speeches supporting its candidate and tries to get others to join its group. At the end, the number of voters in each group determines how many delegates each candidate has won.

  • Both primaries and caucuses can be “open,” “closed,” or some hybrid of the two.

    • During an open primary or caucus, people can vote for a candidate of any political party.

    • During a closed primary or caucus, only voters registered with that party can take part and vote.

    • “Semi-open” and “semi-closed” primaries and caucuses are variations of the two main types.

Learn which states have which types of primaries.

Awarding Delegates from the Primaries and Caucuses

At stake in each primary or caucus is a certain number of delegates. These are individuals who represent their state at national party conventions. The candidate who receives a majority of the party’s delegates wins the nomination. The parties have different numbers of delegates due to the rules involved in awarding them. Each party also has some unpledged delegates or superdelegates. These delegates are not bound to a specific candidate heading into the national convention.

When the primaries and caucuses are over, most political parties hold a national convention. This is when the winning candidates receive their nomination.

For information about your state's presidential primaries or caucuses, contact your state election office or the political party of your choice.

The president must:

  • Be a natural-born citizen of the United States

  • Be at least 35 years old

  • Have been a resident of the United States for 14 years

Anyone who meets these requirements can declare their candidacy for president. Once a candidate raises or spends more than $5,000 for their campaign, they must register with the Federal Election Commission. That includes naming a principal campaign committee to raise and spend campaign funds.

After the primaries and caucuses, most political parties hold national conventions.

What Happens at a National Political Convention?

Conventions finalize a party’s choice for presidential and vice presidential nominees.

To become the presidential nominee, a candidate typically has to win a majority of delegates. This usually happens through the party’s primaries and caucuses. It’s then  confirmed through a vote of the delegates at the national convention.

But if no candidate gets the majority of a party’s delegates during the primaries and caucuses, convention delegates choose the nominee. This happens through additional rounds of voting.

Types of Delegates at a National Convention

There are two main types of delegates:

  • Pledged, or bound delegates must support the candidate they were awarded to through the primary or caucus process.

  • Unpledged delegates or superdelegates can support any presidential candidate they choose.

Contested and Brokered Conventions

In rare cases, none of the party’s candidates has a majority of delegates going into the convention. The convention is considered “contested.” Delegates will then pick their presidential nominee through one or more rounds of voting. 

  • In the first round of voting, pledged delegates usually have to vote for the candidate they were awarded to at the start of the convention. Unpledged delegates don't.

  • Superdelegates can't vote in the first round unless a candidate already has enough delegates through primaries and caucuses to get the nomination.

  • If no nominee wins in the first round, the convention is considered “brokered.” The pledged delegates may choose any candidate in later rounds of voting. Superdelegates can vote in these later rounds.

  • Balloting continues until one candidate receives the required majority to win the nomination.

At the convention, the presidential nominee officially announces their selection of a vice presidential running mate.

Last Updated: March 9, 2022

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