Nah. Bigots, sexists, homophobes, racists and sundry extremists will still need somewhere to go and the GOP will ALWAYS be there waiting with open arms. The question is whether or not normal center-right Americans will split off and form a rational 'conservative' party.  THAT remains to be seen.

All the waffling weasels in the Republican party who refuse to take a stand against Trump will have to live with it for the rest of their lives.