National Security Adviser H.R. McMaster, Defense Secretary Jim Mattis and Secretary of State Rex Tillerson all supported Trump doing so and had worked in the weeks leading up to the trip to make sure it was included in the speech, according to five sources familiar with the episode. They thought it was, and a White House aide even told the New York Times the day before the line was definitely included.
I would love to see all three of these guys announce they were resigning at the same time. Then I think the House and Senate would abandon supporting Trump also and he would be forced to resign.