Indeed the Senate races were shadowed every step of the way by the polarizing presidential race between Clinton and Trump. Yet in the end, Trump was apparently not the drag on GOP candidates widely anticipated. Republicans like Johnson who endorsed him and stuck with it won re-election, as did others like Pennsylvania's Toomey who never backed Trump until the very end. And so did a few like GOP Sen. John McCain of Arizona who un-endorsed Trump after audio emerged of him boasting of groping women.