Clockwise from top left, Sen. John Barrasso, R-Wyo., Sen. Cory Gardner, R-Colo., Chairman Sen. Bob Corker, R-Tenn., Sen. James Risch, R-Idaho, Sen. Jeff Flake, R-Ariz., Sen. Ron Johnson, R-Wisc., and Republican presidential candidate, Sen. Marco Rubio, R-Fla., speak together before Secretary of State John Kerry, Secretary of Energy Ernest Moniz, and Secretary of Treasury Jack Lew, arrive to testify at a Senate Foreign Relations Committee hearing on Capitol Hill, in Washington, Thursday, July 23, 2015, to review the Iran nuclear agreement. | AP/ Andrew Harnik

Why Republicans Reject the Iran Deal — and All Diplomacy

Conservative hostility to this agreement is nothing new. GOP hardliners denounced Nixon and Reagan’s diplomatic achievements too.