Trump claims Omar is 'never happy'

President TrumpDonald John TrumpTrump says he doesn't want NYT in the White House Veterans group backs lawsuits to halt Trump's use of military funding for border wall Schiff punches back after GOP censure resolution fails MORE on Monday claimed Rep. Ilhan OmarIlhan OmarNorth Dakota GOP state lawmaker shares debunked photo, calls Omar a 'terrorist' These 3 women are defining the race to unseat Trump Ocasio-Cortez says endorsing Sanders early is 'the most authentic decision' she could make MORE (D-Minn.) is "never happy" and suggested she should leave the U.S. if she's inclined to criticize it.

In a lengthy diatribe on the South Lawn of the White House, Trump defended incendiary tweets from Sunday in which he suggested progressive congresswomen should "go back" to where they came from.

While he did not specify any lawmakers in his tweets, he targeted Omar extensively on Monday.

“When I hear the statements that they’ve made, and in one case for somebody that comes from Somalia ... and now is a congresswoman who’s never happy, says horrible things about Israel, hates Israel, hates Jews," Trump said. "It’s very simple."

Trump, who has previously decried Omar's comments criticizing the U.S.-Israel relationship, cited past comments from the first-term congresswoman to question her loyalty.

The president appeared to reference a years-old video clip in which Omar lightheartedly recounted the tone of voice a professor would use to talk about al Qaeda. The clip was resurfaced in a Fox News report earlier this year.

Trump also cited Omar's comments about the Sept. 11, 2001, terrorist attacks, which some perceived as minimizing the event.

“CAIR was founded after 9/11 because they recognized that some people did something, and that all of us were starting to lose access to our civil liberties,” Omar said earlier this year in a speech to the Council on American-Islamic Relations.

Omar has said she received an increase in death threats after Trump seized on those comments to chastise the first-term lawmaker.

The Minnesota Democrat prompted allegations of anti-Semitism earlier this year when she suggested those pressing support for Israel were pushing "allegiance to a foreign country."

Trump suggested on Monday that if Omar and others unhappy with the state of affairs in the U.S., they should leave the country.

"All they do is complain," he said. "All I’m saying is if they want to leave, they can leave."

The president sparked an uproar on Sunday morning when he tweeted that unidentified progressive congresswomen "who originally came from countries whose governments are a complete and total catastrophe" should "go back and help fix the totally broken and crime infested places from which they came."

The comments were widely interpreted as targeting Omar and Reps. Alexandria Ocasio-CortezAlexandria Ocasio-CortezDemocratic strategist: Sanders seeking distance from Warren could 'backfire' These 3 women are defining the race to unseat Trump CBS to Ocasio-Cortez on Sanders support: 'As a woman of color, why back an old white guy?' MORE (D-N.Y.), Rashida TlaibRashida Harbi TlaibOcasio-Cortez says endorsing Sanders early is 'the most authentic decision' she could make Ocasio-Cortez: Sanders' heart attack was a 'gut check' moment Ocasio-Cortez tweets endorsement of Sanders MORE (D-Mich.) and Ayanna PressleyAyanna PressleyThese 3 women are defining the race to unseat Trump Ocasio-Cortez mourns Cummings: 'A devastating loss for our country' Lawmakers from both sides of the aisle mourn Cummings MORE (D-Mass.). All four are U.S. citizens, and only Omar, who came to the U.S. as a refugee from Somalia, was born outside the U.S.

Omar has regularly referenced her experiences as a refugee coming to the U.S. since joining Congress in January. She has also been an outspoken critic of the nation's relationship with Israel.

The Hill has contacted Omar's office for a response to Trump's comments. 

"They are working to silence the voices of the people who see themselves represented in me," the congresswoman tweeted minutes after Trump's remarks. "I will stay in the ring, fighting for what is right and will never back down in the face of these attacks."