WASHINGTON (AP) — President Donald Trump on Monday appeared to undercut a proposal that was offered by his special envoy to Iran, saying he will insist that Tehran fully dismantle its nuclear enrichment program as part of any deal to ease crushing sanctions.

After five round of talks, several hard-to-bridge issues remain, including Iran's insistence on maintaining uranium enrichment on its soil and Tehran's refusal to ship abroad its

Iran’s supreme leader has denounced a proposal by the United States aimed at curbing Tehran’s nuclear efforts and demanded that his country retains national independence amid reports of Washington offering to become involved in Tehran’s nuclear program.