Seats with a 10+ lean mostly go for favored party

Share of seats won by president's or opposition party in midterms by how much seats leaned toward either party based on the previous presidential election, 2006-2022

(Please use a modern browser to see the interactive version of this visualization)

The partisan lean of a seat is based on how much more Democratic or Republican the seat voted than the national popular vote for president. The data is reconfigured to represent the lean based on the president's and opposition parties. The president's party is the party that held the White House in a midterm, while the opposition party is the other party.

Source: Gary Jacobson, The Downballot, Almanac of Americans Politics