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.

The preliminary U.S. proposal came as a confidential U.N. report described an Iranian initiative that had multiplied Tehran’s stockpile of near-bomb-grade uranium.

"Iran is drafting a negative response to the U.S. proposal, which could be interpreted as a rejection of the U.S. offer," the senior diplomat, who is close to Iran's negotiating team, told Reuters. The U.