NEW YORK (AP) — President Donald Trump and Iran's top diplomat traded sharp warnings on Tuesday, with Trump threatening "bigger problems" than ever if Tehran restarts its nuclear program. Foreign Minister Mohammad Javad Zarif put the president on notice, telling The Associated Press if the U.S. pulls out of the nuclear deal, Iran "mostly likely" would abandon it, too.

In a wide-ranging interview, Zarif said a U.S. withdrawal from the landmark 2015 accord would undermine Trump's talks with North Korea by proving that America reneges on its promises. He said if Trump re-imposes sanctions, "basic...