Do you have a citation for that?
Rudy never endorsed Clinton. In fact, Rudy was the US Attorney involved in prosecuting Mark Rich and demanded an investigation when Clinton pardoned Rich.
From the NY Times:
Mayor Rudolph W Giuliani cancels meeting with Senator Hillary Rodham Clinton, saying her husband's pardon of Marc Rich, commodities broker charged with tax evation and trading oil with Iran, would be distraction; Giuliani brought case against Rich when he was US attorney in New York and is now calling for congressional investigation into pardon
http://select.nytimes.com/gst/abstract.html?res=F30A1EFB3F5B0C758EDDA80894D9404482&n=Top%2fReference%2fTimes%20Topics%2fPeople%2fR%2fRich%2c%20Marc
Did you see over 1/4th of voters in the FR supported Rudy? that's pretty good for a candidate that some on here say conservatives won't support. :)
While we are having this little break for the truth, let's also announce that Rudy did endorse Mario (the Pious), extreme liberal democrat for governor over Republican Pataki.