More than a week after Election Day, control of the House of Representatives has yet to be decided. Out of the 435 seats in Congress’s lower chamber, 12 have yet to be called. How many of these seats — most of them concentrated in slower-counting Western states such as California and Arizona — does each party need for a 218-seat majority?

After the presidential race was called Wednesday morning, Americans are awaiting the final results of races in the U.S. House of Representatives. All 435 U.S. House of Representatives seats were up for election this year,

Many undeclared seats for the House were in the western U.S. or in swing districts. Here’s a look at what’s already flipped, and what’s left to be called.