Democrats currently have the majority in the Senate. Democrats hold 47 of the chamber's 100 seats. Republicans have 49 seats. Along with those 47 Democrats, four independent senators usually vote with the Democrats, giving them a voting majority.

Republicans are vying to keep control of the lower chamber, while Democrats hope to flip enough seats to take over. There are about two dozen tossup House races, where either party could come away with the win regardless of incumbency,

Voters turned out Tuesday to vote for the next President of the United States, a race between Republican Donald Trump and Democrat Kamala Harris. Democrats and Republicans are also battling for control of the U.S. Senate this election. There are 34 Senate seats up for grabs, with about a half dozen of those likely to be decided by tight margins .