The same question can be asked of the Democrats.  What IS a 'Democrat" these days?

Unfortunately for both parties the answer is the same: someone who defines his or her self as not being of the other party.  It's nothing new.  H.L. Mencken, a far better writer than anyone you can name these days, said it best:

"Under democracy one party always devotes its chief energies to trying to prove that the other party is unfit to rule - and both commonly succeed, and are right."

If this election hasn't convinced everyone that Mencken was right, then nothing will.