The only way Giuliani loses is if conservatives stay home because he is pro-choice. Haven't we learned that three supposedly pro-life Republican presidents over 20 years did nothing to stop abortion? Were there more abortions while pro-choice Bill Clinton was president? Yet we are perfectly willing to walk away from a giant like Rudy Giuliani because of this issue. Once George Bush gets a conservative majority on the Supreme Court, abortion should not even be an issue in a presidential campaign. It will, and should, be fought in the states.
Giuliani cheated on his wife? Ronald Reagan did too, and Nancy was pregnant before they were married. Y'all might be very unpleasantly surprised at the personal peccadillos of many of your conservative heroes.
The next president really needs to accomplish only two things: get federal spending under control, and win the war on terror. I would feel more confident that Giuliani could do those two things than any other candidate out there, and he will kill Hillary on both of those issues.
The War on Terror can't be won if we don't control our borders, and any republican candidate who doesn't come out against illegal immigration may gain a few Latino votes but they will definitely lose a lot of conservative voters.