The comment from the president comes in response to a controversial tweet from the lawmaker that has been widely regarded as antisemitic. Omar had said that Republican support for Israel is "all about the Benjamins."
Forward journalist Batya Ungar-Sargon responded to the Tweet by saying: "Would love to know who @IlhanMN thinks is paying American politicians to be pro-Israel, though I think I can guess. Bad form, Congresswoman. That's the second anti-Semitic trope you've tweeted."
Omar responded to the journalist by saying, "AIPAC!" referring to the American Israel Public Affairs Committee.
When asked about her comments on Tuesday, President Trump called for her to resign.