The battle for the House majority will come down to a handful of toss-up seats scattered across the country, particularly those that Republicans managed to win two years ago despite President Joe Biden carrying the districts in his presidential race. 

There are 19 House districts in which the Republican candidate won in 2022 despite Biden defeating then-President Donald Trump in the 2020 election. Those races became some of the most competitive contests of the 2024 cycle, prompting House Democrats to pour millions of dollars to flip Democratic-leaning seats back in their favor to win the House majority.