President Donald Trump tapped former National Security Advisor Mike Waltz for his administration's ambassador to the United Nations after New York Rep. Elise Stefanik withdrew her nomination so she could hold onto her House seat amid concerns over the GOP's slim majority in the lower chamber. 

"I am pleased to announce that I will be nominating Mike Waltz to be the next United States Ambassador to the United Nations," Trump posted to Truth Social Thursday. 

"From his time in uniform on the battlefield, in Congress and, as my National Security Advisor, Mike Waltz has worked hard to put our Nation’s Interests first. I know he will do the same in his new role. In the interim, Secretary of State Marco Rubio will serve as National Security Advisor, while continuing his strong leadership at the State Department. Together, we will continue to fight tirelessly to Make America, and the World, SAFE AGAIN. Thank you for your attention to this matter!"

The announcement comes after news broke on Thursday morning that Waltz was no longer serving as the administration's national security advisor. ... Read More: FOX News