Watch MSNBC's enthusiastic Steve Kornacki explain where the too-close-to-call Lamb-Saccone race stands

Democrats declared victory in Pennsylvania's 18th congressional district Tuesday night while Republicans and The Associated Press have deemed the special House race between Democrat Conor Lamb and Republican Rick Saccone too close to call. With all precincts reporting, Lamb holds a 579-vote lead over Saccone, or 49.9 percent to 49.6 percent. But there are still absentee ballots to count. It's complicated, but MSNBC's pleasantly frenetic Steve Kornacki has the big touch screen, a black pen, and an evident love for electoral math. If you want to know the state of the race, he is happy to explain.

"I'm happy to talk as much as we can," Kornacki said, getting a laugh from Brian Williams and other people in the studio, but there's not much more "numerical information" to get in the next few hours.

At CNN, Kornacki's fellow electoral math nerd John King said it would take a "mathematical miracle" for Saccone to win with absentee ballots, but even if he does, a tie is a big blow to Republicans; President Trump won the district by 20 points in 2016 and campaigned twice there for Saccone. As elections analyst Stuart Rothenberg put it, "the meaning of the election was clear" hours ago. Peter Weber

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