With their new majority in the US House of Representatives, the Republicans have ousted a Democrat from the important foreign affairs committee.
The House of Representatives voted Thursday with Republican votes to replace MP Ilhan Omar.
This was justified with earlier statements by her, which were criticized as anti-Semitic.
Born in Somalia, she became one of the first two Muslim women to enter the House of Representatives in 2019.
She sparked controversy several times, including through critical remarks about Israel.
In a 2019 tweet, she suggested that the pro-Israel stance of certain US lawmakers was driven by financial considerations.
After much criticism, she apologized.
Omar and other Democrats have criticized the decision.
The move was seen as revenge for the fact that the Democrats - when they themselves still had control of the House of Representatives - had banned two Republican MPs from committees for controversial statements.
This included MP Marjorie Taylor Greene, who lost all committee posts at the time, also because of conspiracy theories.
White House spokeswoman Karine Jean-Pierre also criticized Omar's replacement as party-politically motivated.
The new Republican chairman of the congressional chamber, Kevin McCarthy, rejected the allegations.
"It's not a quid pro quo," he said.
Omar has not lost all committee seats, only the seat on the Foreign Affairs Committee, which entails special responsibilities with regard to international relations.
The Republicans won control of the House of Representatives in the most recent general election.