John Oliver explains why Trump hates the Iran nuclear deal, how he might kill it, and why he's wrong

"It is a busy time for diplomacy in the Trump White House, what with them planning the North Korea summit, weighing what to do about Syria, and a state visit with [French President Emmanuel] Macron next week," John Oliver said on Sunday's Last Week Tonight. And on top of that, Trump faces a massive decision on whether to re-certify the Iran nuclear deal on May 12 — and there's a growing sense that this time, Trump might actually kill the agreement.

Trump has made no secret of his disdain for the pact...