Sens. Ted Cruz, R-Texas, Tom Cotton, R-Ark., and Marco Rubio, R-Fla., wrote in a letter to President Trump urging him to “reject Iran’s nuclear blackmail.”

“Regime officials have signaled they intend to creep towards a nuclear weapon, while demanding concessions and promising to ‘reverse’ their violations if their demands are met,” the senators wrote.

“This deal was built to enable Iranian cheating and allowed hundreds of billions of dollars to flow into regime coffers,” continue the senators. “Allowing the Iranians to boost its military and terrorist activities regionally and globally, even as they maintained nuclear weapons infrastructure, periodically exceeded restrictions on nuclear materials.”

“That’s how the deal was always supposed to work, that’s how it did work, and that’s why it is imperative that the United States now respond forcefully to Iran’s systematic violations by ending civil-nuclear waivers and invoking the U.N. snap back,” they argued.

Click on image below to read the full letter from Sens. Ted Cruz, R-Texas, Tom Cotton, R-Ark., and Marco Rubio, R-Fla., to President Trump.