Trump fires security adviser Waltz, signaling new China line

President nominates hawkish aide as UN envoy, picks Rubio as interim replacement

20250501 Waltz exit

Mike Waltz at the White House on April 3. Waltz was one of the most anti-China members of Congress before becoming national security adviser.  © Reuters

KEN MORIYASU

WASHINGTON -- U.S. President Donald Trump nominated national security adviser Mike Waltz to be ambassador to the United Nations on Thursday, tapping Secretary of State Marco Rubio as his interim replacement. Rubio will double as the top diplomat.

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