A divided Congress: Democrats gained control of the House and Republicans maintained control of the Senate, NBC News projects.
Red state Democrats Sen. Joe Donnelly, Ind., Sen. Heidi Heitkamp, N.D., and Sen. Claire McCaskill, Mo., lost their seats to GOP challengers in states that Trump carried in 2016.
Incumbent Sen. Bill Nelson, D-Fla., said he will deliver a "full statement" on Wednesday. His re-election race against outgoing GOP governor Rick Scott is too close to call and could be headed for a recount.
Georgia Democratic candidate for governor, Stacey Abrams, did not concede in a speech early Wednesday morning and told her supporters to brace for a runoff, even though her opponent, Brian Kemp, currently has exceeded the 50 percent bar to prevent a runoff.