The GOP did not become the big winner last night because they suddenly became popular, or because nationally they ran a great campaign. Nationally they didn't do anything but let the democrats commit suicide.
The GOP won big last night for one reason. The MAJORITY OF AMERICAN's HAVE HAD ENOUGH OF OBAMA AND HIS POLICIES!!
They did not win so they could bend over and kiss their own asses to work hand in hand with the very people they defeated.
Americans have had it with the leftist, liberal agenda of the democratic party. A clear example of this was the governor's race in Maryland. A state where republicans are out numbered 2 to 1 by democrats. Yet they elected a republican governor by a landslide. 56% to 44%. He ran on a lower tax, anti ACA, pro business agenda.
If the GOP fails to recognize this fact then they will be replaced in the next election.