Apples vs. Road Apples.
The GOPe is about 2% better than the Democrats. If Trump is 50% better, than is more than an order of magnitude, and that changes the character of the argument.
"Single Issue Crowd" for which in previous years it was abortion, but now, increasingly, it's abortion and/or immigration. I'm sensing a lot of people think immigration is the greatest threat, because if you don't fix that, there won't be a country left to have abortions in.
"Not conservative enough" crowd. Over time, I've observed that no GOP candidate living has ever reached this level. Even Cruz has people turn on him for the NAFTA/fast track vote and a couple of other single votes.
"Lesser of two evils" crowd. I admit, I've been part of this at times---there really seemed no realistic option.
With Trump, you now see these lines blurring badly. I don't know if Rush's claim that 4 million conservatives stayed home in 2012 is right. There is VERY little evidence to support that, especially in key states where GOP #s were pretty much the same in 12 as in 08. So I tend to think that groups 1 & 2 eventually go #3.
Except now Trump adds a fourth category, which is "Not conservative on some issues, but is THE most conservative candidate when it comes to the 'We the People' vote, which is we the people get to choose our leaders. He is more outspokenly patriotic than anyone but Cruz or (sometimes) Rubio, and he is the least waffling of all of them on immigration. We'll see.