Sen. Lindsey Graham (R-SC) went "On The Record" tonight to weigh in on the ongoing discussions between the U.S. and Iran regarding the Iranian nuclear program.

Graham said that a nuclear-armed Iran is "the biggest threat to mankind."

"I hope they don't get a nuclear weapon, because every Arab in the region will want one," Graham said. "And we're on the road to Armageddon, and Israel will never know a moment's peace."

"Here's what I'm suggesting to [John Kerry]: If it is a good deal, I will vote for it, but I'm not going to give you a pass. I'm not going to give you a blank check," Graham said. "So I will be introducing legislation this week requiring that before any deal with Iran becomes binding, Congress has to approve it."

Graham stated that Congress and the American people should get to look at any potential agreement, as it will have enormous implications not just for the U.S., but the whole world.

"This is the biggest decision that any president will make in my lifetime. If we get this wrong and the Ayatollahs break out and obtain nuclear capability, we'll create a nuclear arms race in the Middle East. Israel is in the crosshairs of this regime, and so are we."

Watch more above.