CNN

Bill and Hillary Clinton on the campaign trail. (Photo credit: Getty Images)

LAS VEGAS, Nevada (CNN) – While Sen. Hillary Clinton is trying to soften her image on the campaign, she is allowing her pit bull - Bill Clinton - to go on the attack.

In a version of "good cop/bad cop" the couple has gone after the senator's closest rival for the Democratic presidential nomination, Sen. Barack Obama.

The former president aggressively interjected himself into a debate Wednesday when he became visibly combative with a reporter after being questioned about a lawsuit in Nevada that sought to ban caucus meetings in nine casinos on the Las Vegas strip.

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