The Obama administration secured vital support for the Iran deal this week, after it emerged that at least 42 senators endorsed the proposed agreement, announced in July in Vienna at a summit between Iran and world powers. The White House likely won't have to veto a congressional bill aimed against it, meaning the pact's smooth passage is now more or less a fait accompli.
That, of course, doesn't mean the rancorous debate over the rights and wrongs of the deal will end. The threat of Tehran's nuclear program has seemingly sucked up all the foreign policy oxygen in Washington in recent months and will stalk the election campaign in the months ahead, beginning with a Donald Trump-Ted Cruz rally on Wednesday in the capital.