Why Isn't Giuliani Less Popular?

I think this is a good explanation. [Link]

People in the know used to think the rubes just didn't realize Rudy has dressed in drag and once lived with 2 gay guys; they just remembered him as the star of that 9/11 show they saw on TV that one time.

But now it's dawning on the pundits that Americans probably know all that stuff by now, so why isn't Rudy sunk? They're shuffling around for explanations. You could say "terrorism fears trump everything," or "the rest of the field is weak." But Rich thinks the right answer is that Americans really aren't as narrow-minded as they are portrayed by Tony Perkins of the Family Research Council, James Dobson of Focus on the Family, Gary Bauer of American Values

And I agree with this as well:

This is my favorite thing about Giuliani: his potential to bring out the social liberal in the Republican Party.

By the same token, my favorite thing about Hillary Clinton is her potential to bring hawkishness to the Democratic Party.