<span style="color: #222222;">Iran's supreme leader Ayatollah Ali Khamenei today called the end of oil sanction waivers by the United States, a hostile measure that won't be left without a response.</span><br />'' <span style="color: #222222;">  </span><br />'' <span style="color: #222222;">The leader took to twitter saying  US efforts to boycott the sale of Iran's oil won't affect the export at all. </span><br />''