The fundies, neo-cons, christian right base who made* Bush President and have been his biggest supporters, will jump from the republican ship if liberal philanderer adulterer cross dresser flip-flopper Rudy Giuliani becomes the party nominee. (And threaten his chances via third party conservative candidate).
Giuliani Inspires Threat of a Third-Party Run
Religious right may blackball Giuliani
* Yesh Girsaot - some say it was due to 800 senile bubbies in Miami.