Giuliani speaks with NASCAR Nextel Cup driver Kenny Wallace Sunday before the start of the Sylvania 300 auto race at the New Hampshire International Speedway.
LOUDON, New Hampshire (CNN) - Republican presidential candidate Rudy Giuliani Sunday continued his defense of Gen. David Petraeus and explained to reporters why he launched his Web advertisement criticizing Sen. Hillary Clinton for not denouncing a MoveOn.org ad attacking him.
"[My] motivation was to stand up to her and to stand up for a very, very good general," the former mayor of New York City said. "What she did was just plain wrong. Sometimes there are things that are just wrong. It was wrong for her to attack the integrity of a commanding general in a time of war. It's not the right thing to do."
Giuliani's Web advertisement attacked Clinton and portrayed her position on the Iraq war as inconsistent and her remarks as disrespectful toward Petraeus.
The advertisement also denounced the liberal group MoveOn.org for their advertisement against the general and called on Clinton to do the same.
When asked by CNN if his advertisement would introduce more mudslinging into the campaign, Giuliani responded, "How come you're not asking that about MoveOn.org? Why don't you ask that about Hillary Clinton?"
"I didn't attack an American general," he added. "I am raising a point about an American politician, not about an American general and I think I have every right to do that."
Rudy Giuliani spent Sunday at the New Hampshire International Speedway for the NASCAR Nextel Cup-Sylvania 300. This was the second time the presidential hopeful attended a NASCAR event.
Amidst cheers for celebrity drivers Dale Earnhardt, Jr. and Jeff Gordon, were cries of "Rudy, Rudy!" as he walked through the stadium signing autographs, taking photographs and shaking hands.
One supporter walked up to him and said, "See you in 2009." A few seconds later, Giuliani said to another fan, "Tell him '08 just in case. When he shows up in '09 it won't do us any good."
- CNN New Hampshire Producer Sareena Dalla