In the first staffing shakeup of his new administration, Secretary of State Marco Rubio will replace Mike Waltz as acting National Security Adviser. President Donald Trump named Secretary of State ...

Secretary of State Marco Rubio said on Friday. Speaking in Paris, Rubio said: "We're not going to continue with this endeavour for weeks and months on end. So we need to determine very quickly now ...

that he's nominating Mike Waltz to serve as United States Ambassador to the United Nations, shifting from his role as national security adviser. In the interim, Secretary of State Marco Rubio will ...