USA LIVE: Trump administration faces first shake-up with removal of Mike Waltz as national security advisor | CNBC TV18 TUSCALOOSA, ALABAMA - U.S. President Donald Trump delivers a commencement address at the University of Alabama. President Donald Trump will nominate Mike Waltz to serve as his UN ambassador after ousting him as national security adviser in the first White House shake-up of his second term. The news came after a morning of fervent speculation concerning Waltz’s future and reporting that he was being pushed out of the administration. Secretary of State Marco Rubio will add interim NSA to his responsibilities until a replacement is found. At the National Prayer Day event in the Rose Garden, Trump made no mention of the shake-up, and Waltz was absent despite being on campus earlier. Meanwhile, former vice president Kamala Harris mercilessly rebuked the president in her first extensive remarks since leaving Washington, D.C., in January, saying his tariff-based trade war was inviting recession and amounted to the “greatest man-made economic crisis in modern presidential history.” #mikewaltz #trump #marcorubio #universityofalabama #livenews #uspolitics #cnbctv18