A letter U.S. President Donald Trump wrote to Iran’s supreme leader in an attempt to jump-start talks over Tehran’s rapidly advancing nuclear program has arrived in the Iranian capital.

"Their talks are not aimed at solving problems," said Supreme Leader Ayatollah Ali Khamenei, without mentioning the United States by name.

Iran's comments come after President Trump sent him a letter expressing his desire to negotiate a new nuclear deal, he told Fox News Channel on Sunday. Iran's Foreig