These races were deemed competitive by The Huffington Post based on polling and research.

Two independents, Sen. Bernie Sanders (Vt.) and Angus King of Maine, are expected to caucus with Democrats in the Senate if they win.

0

Current House makeup (until Jan. 3, 2013): 193 Democratic Seats 242 Republican Seats Polls open

Polls open Polls closed Dem leading

Dem leading Dem won GOP leading

GOP leading GOP won Races to watch

These races were deemed competitive by The Huffington Post based on polling and research. Each row of races is labeled with the pre-election outlook.

Outlook

All races

All 435 seats in the House of Representatives are up for election every two years. The number of seats allocated to each state is determined by its population. Because of redistricting, many representatives are running in new districts.