The final doors are being knocked, ads are blaring and candidates are making a last pitch to voters. Even with the high-energy final push, the races for control of Congress are at a stalemate, essentially a toss-up for the House and fight to the finish for the Senate.

Republicans currently hold a majority in the House, while Democrats control the Senate, both by slim margins. Polls suggest the two parties could switch control of each chamber, with Democrats winning back the House and Republicans retaking the Senate.

To keep Senate control, Democrats would need to win all those races but West Virginia — or pull off at least one upset elsewhere. Their best hopes are in either Texas, where Colin Allred, a House Democrat,