I have no problem, in theory, with Republicans. One of the best Governors NJ had was Chrostine Todd Whitman, a Republican. One of the worst was Chris Christie, also a Republican. Brendan Byrne was a good Democrat Governor, Jon Corzine was a so-so Democrat Governor.
It's not that teh Majority of voters dislike or hate Trump for being a republican, in truth some republicans who oppose him don't even consider him a Republican since he has done some very anti-Republican things while in Office. They oppos Trump because of the chaos he has caused, the ways he has screwed up and the problems he's made worse and the laws he has broken and so on ans so forth.
The only problem I had with McCain was his choice of Palin as his running mate when he could have chosen someone better.