Gee, I don't know. Why don't you ask all the staunch conservative who are supporting him like Newt who stopped just short of an endorsement (because he isn't sure if he'll run despite having higher negative numbers than Hillary) or Rep. Sessions who has a 98% lifetime conservative rating.
I could go on, but you get the idea.
Can't you think for yourself and see that Giullani is a liberal on an unacceptably large number of issues?