Sen. Lindsey Graham (R-SC) went "On The Record" tonight to weigh in on ISIS's claims there are terror cells in 15 states.

"Our system is failing," Graham said. "What keeps me up at night is system overload. So, if President Obama doesn't take the fight to these guys in Syria and Iraq to disrupt their networks, they're going to come here."

Graham noted that 1,000 foreign fighters per month are now going to Syria to join ISIS, meaning there are an exponentially growing number of people with Western passports who are trained by ISIS.

"President Obama's foreign policy has failed on multiple fronts," Graham said. "It is only a matter of time now, I believe, unless we change our policies, [until] we'll have a big attack in this country directly related to Syria."

He said that the war in Syria is a "cancer" in the region that must be stopped.

Graham said if he were president, he would send some U.S. boots on the ground to help our Arab allies destroy ISIS and then go after Syrian president Bashar al-Assad.

"Terrorist groups today are large, rich and entrenched. What we need to do is make them small, poor and on-the-run," Graham stated.

"If we don't change this and we don't change our policies, it's only a matter of time until we get hit hard."

Watch more from "On The Record" above.

You might also be interested in ...

ISIS Allegedly Claims It Has 71 Soldiers in 15 American States

'Carte Blanche to Be Terrorists': Herridge on Role of ISIS in Texas Shooting

ISIS Claims Responsibility for Attack on Muhammad Cartoon Event

'Once Free Speech Goes, It's Over': 'Draw Muhammad' Contest Winner Sounds Off