But the Democrats’ chances of holding the Senate aren’t particularly good. Right now Republicans hold 47 of the 100 seats; if they win the presidency, they would need to pick up three more seats to have a majority. As of today, they are favored to pick up two Democratic seats. Two Republican seats are tossups, along with six Democratic seats. If we assume Democrats pick off one of the two Republican tossups, and that Republican pick off half of the Democratic tossups, Republicans would have a 51-49 majority.