Iran's supreme leader criticizes US nuclear proposal

Iran’s supreme leader on Wednesday criticized the U.S. proposal for a nuclear deal, signaling a major setback in President Trump’s effort to secure an agreement boxing in the Islamic Republic’s rapidly advancing nuclear program.

Ayatollah Ali Khamenei did not reject the initial U.S. proposal, which Trump envoy Steve Witkoff presented to Iranian negotiators on Saturday. 

But the top Iranian official underscored Tehran’s demand that it would not give up enrichment, a key sticking...