Senator Mark Kelly, an Arizona Democrat and former astronaut, visited Ukraine over the weekend and said the United States could not give up on the people there as they fight Russia. Musk responded on X.

U.S. DOGE Service leader Elon Musk on Monday called Sen. Mark Kelly (D-Arizona) — a decorated Navy pilot and former NASA astronaut — a traitor in a post on X after the senator visited Ukraine and expressed his support for the country in its war with Russia.

President Donald Trump’s increasingly influential adviser, Elon Musk, called Sen. Mark Kelly (D-AZ) “a traitor” over a social media post about the Arizona Democrat’s recent visit to Ukraine. The senator’s visit to Ukraine was his third since the country was invaded by Russia in 2022,