Should he become president, Sen. Lindsey Graham would go to war whether Americans like it or not.

The 2016 GOP presidential candidate was questioned hard Thursday on Fox News for his past war hawk stances, but he didn't budge.

"Well, don't vote for me," the South Carolina Republican said when told by host Steve Doocy the American people are worn out by war. "Don't vote for me, because I'm telling you what's coming: Barack Obama's policies leading from behind are going to allow another 9/11.

"[ISIS] is large, rich, and entrenched. If I'm president they will be poor, small, and on the run," he said, referring to the Islamic State of Iraq and Syria, a terror group attempting to take over Iraq and Syria.

Graham asserted that U.S. ground forces are necessary for defeating the Islamic State.

"I'm trying to tell the American people and the Republican primary voter: The only way I know to defend this country is to send some of us back to Iraq and eventually to Syria to dig these guys out of the ground, destroy the Caliphate, kill as many of them as you can, hold territory and help people over there help themselves," he said.

Graham, one of South Carolina's senators since 2003, launched his presidential campaign Monday. He sits on the Senate Armed Services committee and has been assertive in his aggressive foreign policy hawk ways, setting up foreign policy to be a major cornerstone of his presidential campaign.

Graham also took shots at Hillary Clinton, the former secretary of state and Democratic presidential frontrunner.

"I think it's the lack of confidence in her ability to distinguish herself from Barack Obama," he said, referring to the lack of Clinton's media availability as she campaigns. Clinton has caught heat lately over her hesitancy to talk to reporters.

"Her biggest nightmare is for someone to ask her, 'Hey, do you think the war on terror is going well? Do you agree with Barack Obama's foreign policy?'" he said, criticizing what could be perceived as secrecy on the campaign trail. "'If you don't, tell us why.'"

"Well, it's easier to talk to the North Korean guy than it is her," he said of her inability to take questions, comparing Clinton to North Korean leader Kim Jong-un. "At the end of the day, when 57 percent of people don't trust you, you've got a problem."

Graham has a far way to go in his presidential campaign. With 1.3 points, he is last in a RealClearPolitics average of polls of 14 declared and likely-to-declare 2016 GOP presidential candidates.