In a two person race, why wouldn't you select the person who supports more of your views than the other candidate?
Because we have a better chance of gridlock is Hillary! wins?
Whereas, with Guiliani as President, the Democrats will enthusiastically support his liberal policies in the spirit of "bipartisanship," while the 'Pubbies will be forced to go along.
Rudy's "conservatives" policies (such as they are) will, of course, be DOA.
Gridlock would be better.