Trump didn't blow up the party on his own. He had help from a field of presidential contenders that was touted as deep and talented but proved shallow and wanting. Bush raised shock-and-awe money but turns out to lack his father's and brother's skill at performing on the national stage; he seems to want to be crowned, not elected. Rubio is like the teacher's pet who speaks eloquently in class but doesn't do his homework. Chris Christie was slow off the mark, perhaps having been stuck in traffic on the George Washington Bridge.