His racist, vitriolic comments will eventually become too big a cross to bare. People like Paul Ryan and other Republican party leaders will find themselves unable to explain how they can condemn what the candidate is saying as racist and not in line with their party views while still supporting teh candidate for no other reason than that "Hillary isn't the answer".
At some point, the question becomes, how Donald Trump's party endorsers can explain why they support him, Hillary aside. What makes them feel that it's OK to have a person who makes racist comments in the white house, so long as it's not Hillary. What makes it OK to have a person in the White House who has proven that he will explode and overreact to the slightest criticism from our nation's allies and or enemies?
When the media starts asking those questions in the general, Trump supporters are going to have to start second guessing themselves and their decision to support Trump.