Revisit 2020 election results maps as 2024 results come in
Former President Donald Trump and Vice President Kamala Harris were separated by only razor-thin margins in the seven battleground states that were key to the 2024 presidential election, but Trump went on to win enough to secure a second term.
The 2024 election map shows some similarities to the landscape Trump encountered four years ago, when he was defending the White House against Democratic challenger Joe Biden.
This year, Trump managed to win back a few states that he lost in 2020 but won in 2016, when he punctured the Democratic "blue wall" and claimed the presidency. Projected victories in North Carolina, Georgia, Pennsylvania and then Wisconsin put him over the top in 2024.
The 2020 Electoral College map
In 2020, Mr. Biden won 81,284,666 votes nationwide, compared to Trump's 74,224,319.
But the presidency is won in the Electoral College, not the popular vote. Mr. Biden bested Trump by that measure, too, winning 306 electoral votes to Trump's 232. A majority in the Electoral College — 270 votes — is needed to win the White House.
The Biden campaign built a coalition that helped him recapture once-reliable blue states that Trump had flipped in 2016, returning Wisconsin, Michigan and Pennsylvania to the Democratic column. He also picked up Arizona and Georgia to solidify his victory.
This map shows the states that Trump and Mr. Biden won in 2020:
For 2024, CBS News considerd seven states to be battleground states that will largely decide the race. Those states are:
Pennsylvania's 19 electoral votes made it the biggest prize of the night.
How the electoral map has changed since 2020
The Electoral College votes are apportioned based on each state's representation in Congress. Every state gets at least three votes — one for each of their two senators, and one for each representative in the House. (This gives smaller states outsized influence on the result, since a state like Wyoming or Vermont is guaranteed more electoral votes than it would receive if they were divided strictly by population.) The District of Columbia also gets three votes, although residents have no voting members in Congress.
The electoral votes are reapportioned every 10 years as states gain or lose House seats based on their fluctuating populations. Those determinations are made by the results of the U.S. Census. If a state's population increased relative to other states, it might gain a seat or two. If its population decreased, a seat might go elsewhere.
Six states gained electoral votes in the 2024 race: Colorado, Florida, Montana, North Carolina and Oregon gained one each, and Texas gained two. Conversely, seven states lost a vote: California, Ohio, Michigan, New York, Pennsylvania and West Virginia.
Here is a look at where states have gained and lost Electoral College votes since 2020: