That's been evidenced by the disdain and disrespect he's exhibited toward Obama since the day he was sworn into office. This is going to backfire on him and any "purple state" Republican senators who are up for election this year. Obama is probably going to nominate a black or Hispanic female, and then just sit back with glee and watch Hillary use this to paint the entire Republican congress as sexist and racist (they are, of course, but this will just emphasize the point). Trump was already going to get creamed by black, Hispanic, and female voters in November. If the Senate refuses to confirm Obama's nominee, Hillary will win the presidency in a landslide, and the Democrats will likely take back the Senate. Then they can just sit back and watch the heads of McCornhole and his goober senate brethren explode when they realize that their intransigence has cost them any leverage they had when it comes to the supreme court nomination. It will be fun to watch!!