Horndog Mayor Has Hillary in a Bind

UNDORSEMENT? Villaraigosa

It isn't only Antonio Villaraigosa's political rivals who are gleeful over the Los Angeles mayor's extramarital exploits. Democratic presidential hopefuls not named Hillary Clinton are snickering at how one of the party frontrunner's most coveted supporters has suddenly become a potential embarrassment.

Villaraigosa, who serves as one of four national co-chairmen of Clinton's campaign, admitted earlier this week that he's been having an affair with Telemundo news anchor Mirthala Salinas. Villaraigosa's wife Corina—the two merged their last names, Villar and Raigosa, when they married in 1987—announced their separation last month. (Salinas has been pulled off of the air while her bosses look into whether she violated the station's ethics rules.)

A rising star in the Democratic party, Villaraigosa's endorsement had been heavily courted by other candidates, especially New Mexico governor Bill Richardson, the only Hispanic in the race. "They're probably pretty relieved now that they didn't win that one," laughs an insider from another campaign.