True conservatives would leave before moderate Republicans. Trump is the most moderate the GOP has seen in a long time. And I don't know if true conservatives would really let Hillary win.
Agreed,
Why would moderate Republicans leave the party when Trump is essentially one of them.
Can we dispel with this fiction that Trump is a moderate already? Wanting to build a wall and ban all Muslim immigration cancels out whatever moderate views on other issues he may have.
Not to mention shredding the Geneva Conventions and encouraging Japan, South Korea, and who knows how many other countries to develop nukes.
Edit: Honestly the wall is (somehow) among his less outlandish ideas. It's stupid, a waste of money, and would likely damage our standing in the world, but it isn't outright dangerous like much of his other nonsense.