a statistically signficiant number of republicans say they wont vote for trump

Current Events

I'll believe it when I see it, but I also wouldn't be surprised if it is true.

Trump brought radical change and is promising further radical change, to a party that, until recently, was against massive/radical change, at least in theory and based on the fact they're ostensibly conservative (keeping things the way they are/were)

So I wouldn't be surprised if there's a fair amount that don't care to see more Trump.
The name is wackyteen for a reason. Never doubt.