[quote=spdrun]How do you know? Might be enough irate voters to turn the Senate and House blue.[/quote]
Look at the polls.
No poll ever said that house was ever in play this election. GOP has structural advantage due to last redistricting.
Senate was in play only when Hillary had 6+ point lead in the poles. If Hillary wins by small margin or loses, the senate will remain to be red.
The only two scenarios now seem to be (i) narrow Hillary win + red house + closely divided red/blue senate + unknown supreme court or (ii) narrow Trump win + red house + red senate + red supreme court.