Matt Gorman, spokesman for the National Republican Congressional Committee, told NBC News that the party is "absolutely not conceding" to Democrat Conor Lamb in the special election in Pennsylvania's 18th congressional district. Gorman added, "We are waiting for provisional ballots on Friday. And we are not ruling out a recount or other legal actions.”

Between the lines: Regardless of the ultimate victor, last night’s election results were a tough pill to swallow for the GOP. The district voted for Trump by 20 points, and Lamb managed to close that gap against Republican Rick Saccone.

Potential legal challenges to benefit the GOP , per NBC News’ Alex Moe: “Reports of miscalibrations of voting machines in Allegheny Co; Report GOP was kicked out of room counting absentee ballots in Allegheny Co for 90mins; Reports of mistakes on PA SOS website”

, per NBC News’ Alex Moe: “Reports of miscalibrations of voting machines in Allegheny Co; Report GOP was kicked out of room counting absentee ballots in Allegheny Co for 90mins; Reports of mistakes on PA SOS website” Yes, but: Even though he's not conceding, Saccone’s camp has told NBC News that he plans to run again in 2018 in the soon-to-be-redistricted 14th congressional district, which will be a more GOP-leaning district.

Big picture: Cook Political Report’s Dave Wasserman says it's “not a surprise” that “Lamb (D) expanded lead with Washington Co. absentees. Hard to see why Rs would want to drag this out when they've got so many other races to be worried about.”