"I can't imagine in World War for Roosevelt to have gone to a bunch of judges and said, 'I need your permission before we can attack the enemy,'" Graham said during a speech in Easley, S.C., according to the local Patch.

Graham also defended the administration's drone program, saying it "has been very effective."

"We've killed 4,700," Graham added. "Sometimes you hit innocent people, and I hate that, but we're at war, and we've taken out some very senior members of Al-Qaeda."

The comments come as a number of top legislators and U.S. officials are debating whether the Obama administration needs to change how it conducts drone strikes. Earlier in February, NBC News reported on a Department of Justice (DOJ) memo laying out the Obama administration's legal rationale for conducting lethal drone attacks on U.S. citizens abroad.

The memo argues that the U.S. can conduct a drone strike if the target has been deemed an "imminent threat" by a U.S intelligence official, it's impossible to capture the target and the strike falls in line with international wartime laws pertaining to the use of force.

But the leaked memo only sparked more congressional questions, with lawmakers pressing top White House counterterrorism adviser John Brennan, President Obama's pick for CIA director, on the administration's program. Lawmakers have called for more details on the strikes and want the DOJ to release its actual legal briefs defending the practice of targeting U.S. citizens abroad.

Former Secretary of Defense Robert Gates recently argued that while the Obama administration has not abused its use of drones, there should be additional oversight.

"And so I think — I think this idea of being able to execute, in effect, an American citizen, no matter how awful, having some third party being ... having a say in it or perhaps some — informing the Congress or the intelligence committees or something like that ... I think some check on the ability of the president to do this has merit, as we look to the longer term future," Gates said.

Democratic Sens. Dianne FeinsteinDianne Emiel FeinsteinGun proposal picks up GOP support Gingrich: Banning rapid fire gun modification is ‘common sense’ House bill set to reignite debate on warrantless surveillance MORE (Calif.) and Patrick LeahyPatrick Joseph LeahyOvernight Regulation: Massachusetts AG sues Equifax | Trump weighs easing rules on gun exports | EPA nominee to fight worker safety rule in court Trump to ease rules on gun exports: report Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions MORE (Vt.) have both expressed interested in the idea and said they were open to hearings examining the matter.