WASHINGTON: US President Donald Trump and Saudi Crown Prince Mohammed bin Salman discussed the situation in war-torn Yemen during a meeting on Tuesday, including Houthi rebel and Iranian activity and the humanitarian crisis, the White House said. "On Yemen, the President and the Crown Prince discussed the threat the Houthis pose to the region, assisted by the Iranian Islamic Revolutionary Guards Corps," it said in a statement on Wednesday. "The leaders discussed additional steps to address the humanitarian situation and agreed that a political resolution to the conflict is ultimately necessary to meet the needs of the Yemeni people."  Trump said he is looking forward to welcoming King Salman to Washington.