Democrats and Republicans are 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. The winners of each race will serve six-year terms in the Senate.

This year’s elections has a raft of competitive races in the House and Senate, as well as several gubernatorial contests around the country. The Senate is all but likely to fall under Republican control when it’s all said and done,