National Security Adviser Gen. H.R. McMaster is resigning from the Trump administration and will be replaced by former U.S. ambassador John Bolton, according to a tweet Thursday afternoon from President Donald Trump.

>> Read more trending newsWho is H.R. McMaster, Trump's national security advisor/

National Security Adviser H.R. McMaster attends a meeting between President Donald Trump and Crown Prince Mohammed bin Salman of the Kingdom of Saudi Arabia in the Oval Office at the White House on March 20, 2018 in Washington, D.C.

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Workers, clean up damaged house near Paulding County High School after a storm passed through, Sunday, March 16, 2025, in Dallas. National Weather Service teams will be conducting a damage survey in the Paulding County/Dallas area, which sustained “pretty significant” damage from the storms, NWS Senior Meteorologist Dylan Lusk told The Atlanta Journal-Constitution on Sunday morning. (Hyosub Shin / AJC)

Credit: HYOSUB SHIN / AJC