Rep. Mike Waltz (R., Fla.), who President-elect Trump has picked to serve as his national security adviser, has resigned from Congress. A former Green Beret, Waltz has served in the House since 2019,

WASHINGTON (Reuters) - President-elect Donald Trump's incoming national security adviser, Mike Waltz, said on Sunday that if Hamas reneges on the Gaza ceasefire-for-hostages deal, the United States will support Israel "in doing what it has to do."

Michael Waltz, President-elect Donald Trump's choice for national security adviser, during a deployment as a Green Beret to Afghanistan’s Tagab Valley in 2006. He was an officer in the National Guard who served in Afghanistan with the 20th Special Forces Group. (Michael Waltz via The Washington Post)

Trump’s pick to lead the National Security Council, introduced Pete Hegseth to the committee, describing him as the “first junior officer” to serve as defense secretary. “It is critical that President