Freshman Rep. Ilhan Omar called White House adviser Stephen Miller a “white nationalist” in a tweet on Monday afternoon.

Omar, a Democrat from Minnesota and one of the first Muslim women elected to congress, made the statement as Miller reportedly pushed President Trump to move immigration enforcement in “tougher direction.”

“Stephen Miller is a white nationalist. The fact that he still has influence on policy and political appointments is an outrage,” Omar wrote in the tweet, accompanied by a link to a story about Miller in Splinter News.

Miller, an immigration hardliner, has been the driving force behind a number of Trump’s controversial immigration policies, including the travel ban and family separation on the southern border.

Critics of the congresswoman, including Donald Trump Jr., quickly condemned her statement.

“I see that the head of the Farrakhan Fan Club, @IlhanMN, took a short break from spewing her usual anti-semitic bigotry today to accuse a Jewish man of being a ‘white nationalist’ because she apparently has no shame,” Trump Jr. wrote on Twitter.

Omar has been criticized in recent weeks for a number of statements that critics say were rife with anti-semitic tropes.

In March, Omar suggested that American supporters of Israel are forced to “pledge allegiance” to the nation.