the most expensive race in u.s. house history now in its final hours. who is going to win this nasty battle? hello, everyone. welcome to "the lead." i'm jake tapper. we're going to talk about a u.s. warplane flying over the syrian area could be shot down by russia. that is a stark warning by the kremlin after the u.s. shot down a syrian jet over the weekend, one that the u.s. pentagon said dropped bombs on u.s.-backed anti-regime forces. russia issuing this threat of sorts to the u.s. stay out of our way. any aircraft caught west of the euphrates river will be tweeted as, quote, air targets. how seriously is the pentagon taking this threat from the kremlin? >> well, jake, to be clear, the pentagon not looking for a dogfight with the russians but taking it strongly enough to