Nate Silver of FiveThirtyEight has calculated that for one candidate, winning isn’t enough.

In order for Joe Biden to have just a 46% chance of becoming President, he needs to win the popular vote by 2% to 3% (about 3 million votes).
A 3% to 4% lead in the national popular vote would give Biden only a 74% chance of becoming President.
 
The reason for this is that state “winner-take-all” laws award all of a state's electoral votes to the candidate receiving the most popular votes in each state.

If a candidate can eek out a small win in one or more closely divided states, it really doesn't matter what the rest of the country thinks under the current state-by-state winner-take-all method of awarding electoral votes.
 
  • In 2016, Donald Trump became President even though Hillary Clinton won the national popular vote by 2,868,518 votes. Trump won the Presidency because he carried Michigan by 11,000 votes, Wisconsin by 23,000 votes, and Pennsylvania by 44,000 votes. Each of these 78,000 votes was 36 times more important than Clinton's nationwide lead of 2,868,518 votes.
  • In 2000, George W. Bush became President even though Al Gore won the national popular vote by 537,179 votes. Bush won because he carried Florida by 537 votes. Each of these 537 votes was 1,000 times more important than Gore's nationwide lead of 537,179 votes.
 
The National Popular Vote bill will guarantee the Presidency to the candidate who receives the most popular votes in all 50 states and the District of Columbia.
 
If you agree that the candidate who gets the most popular votes nationwide should become President, please send an email to your state legislators and ask them to support the National Popular Vote bill.
BACKGROUND INFORMATION
The National Popular Vote bill will guarantee the Presidency to the candidate who receives the most popular votes in all 50 states and the District of Columbia.

The shortcomings of the current system stem from state “winner-take-all” laws that award all of a state’s electoral votes to the candidate receiving the most popular votes in each state.
Because of current state winner-take-all laws, presidential candidates regularly ignore three-quarters of the states in the general-election campaign. Candidates ignore states where they are safely ahead or hopelessly behind.

In 2016, virtually all (94%) the general-election campaign events (and virtually all campaign expenditures) were in the 12 closely divided states where Trump’s support was between 43% and 51%. Thirty-eight states were virtually ignored, including 12 of the 13 smallest states and almost all rural, agricultural, Southern, Western, and Northeastern states.

Voter participation is depressed in states that are ignored in presidential elections. Voter turnout was 11% higher in 2016 in the dozen closely divided battleground states.

The U.S. Constitution (Article II) gives states exclusive control over awarding their electoral votes: “Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors….”

The winner-take-all method of awarding electoral votes is not in the U.S. Constitution, was not debated at the 1787 Constitutional Convention, and was not mentioned in the Federalist Papers. It is purely state law, and state laws may be changed the same way as they were originally enacted (namely by action of the state legislature).

The National Popular Vote compact will take effect when enacted by states with a majority of the electoral votes (270 of 538). After the compact comes into effect, all the popular votes for each candidate from all 50 states and DC will be added together. All of the electoral votes from all of the enacting states will be awarded to the candidate getting the most popular votes in all 50 states and DC. The presidential candidate supported by the most voters in all 50 states and DC will thereby win a majority of the electoral votes in the Electoral College (at least 270), and thus become President.

The compact has been enacted by 15 states and the District of Columbia (together possessing 196 electoral votes), including 4 small states (DE, HI, RI, VT), 8 medium-sized states (CO, CT, MD, MA, NJ, NM, OR, WA), and 3 big states (CA, IL, NY).

The compact will take effect when enacted by states with 74 more electoral votes (for a total of 270). The compact has already passed at least one legislative chamber in 9 additional states possessing 88 electoral votes (AR, AZ, ME, MI, MN, NC, NV, OK, VA).

The National Popular Vote bill will ensure that every vote, in every state, will matter in every presidential election.

Learn more at National Popular Vote.