U.S. President Donald Trump spoke during a U.S.-Saudi Investment Forum Tuesday after having touched down in Saudi Arabia aboard Air Force One on the first stop of four-day visit to the region.

The Houthis have agreed to stop attacking U.S. ships but plan to escalate against Israel, citing retaliation for the Gaza war.

A series of side deals by the U.S. administration is raising questions about how closely in sync the allies are over major challenges in the region.