We need at least two viable functioning parties in our political system, and if the flakes and zealots would peel off of the GOP and join Trump, the GOP has to resolve to never let the crackpots back into the tent. They've invited various groups - racists, moral majority, tea partiers, to their own detriment. A conservative party is fine; a party of crackpots is not.

A one-party political system is no longer a Democracy and is to be avoided at all costs.