I am a conservative who usually votes Republican because the conservative candidate is usually a Republican. I WILL NEVER VOTE FOR A LIBERAL, regardless of the party affiliation.
It is the GOP’s responsibility to provide a real conservative candidate, and if they fail to do so, they will not have my vote. It will be their failure, not mine.
Frankly, if it is a choice between Hillary and Rudy, I would rather have Hillary. If she wins, the GOP will oppose her policies. If Rudy wins, they will support them.
The Party has a system.
Members of that Party who wish to be elected to political office, campaign for the votes of the membership during the primaries, and one gets chosen at the Party's Convention.
I would probably be a quicker, cheaper procedure if the Party's leadership just called you and asked you whom to nominate so that they could get YOUR vote, but then, they'd have to do that with everyone.
If you are a registered Republican, and you do not vote for the candidate chosen by the membership of the Party, then you are a Republican in Name Only...a RINO.
If you "would rather have Hillary" ("A LIBERAL") for any reason whatsoever, because you expect the Party to oppose her policies because they are liberal, EVEN IN LIGHT of the fact that you claim that you would rather have her than a Liberal nominated by the GOP, then you're either a liberal yourself, or just plain stupid.