“I am immediately calling on Chairman Mast to hold a hearing on what might be the most astonishing breach of our national security in recent history,” says New York Congressman Greg Meeks. The ranking House Foreign Affairs committee chair is addressing the reported revelation that Secretary of Defense Pete Hegseth, Vice President J.D. Vance, and others used the encrypted phone app Signal to map out a war plan against the Houthis that took place on March 15.