"This is not just about threats to individual members of Congress, but it is about creating a volatile environment in this country through violent rhetoric that puts anyone, like Ilhan, anyone who believes in the rights of all people in danger and I think that he has a responsibility for that environment", she said.
The allegation, made without evidence, was the latest in a series of grave attacks Trump has directed at the four ethnic-minority congresswomen, who hail from the left of the Democratic party and have been sharply critical of his presidency.
Sunday's Twitter message came a week after the president said that the women, all minorities, should "go back" to the "corrupt and inept" countries they came from - a message condemned by Democrats and some Republicans as racist.
Omar came to the United States as a Somali refugee when she was a teen and is a naturalized USA citizen. He falsely said he tried to stop the crowd.
The Democratic-controlled House voted largely along party lines last week - 240-187 - to condemn Trump's comments.More news: Highlights: Pinot, Alaphilippe seal French one-two as Thomas loses ground
The "anti-Semitism" and "anti-Israel" card has been played by Trump against the congresswomen before, as Omar and Tlaib are prominent supporters of the BDS (Boycott, Divestment and Sanctions) movement. He said some of his constituents were scared of the president. However, the impeachment resolution was set against President Donald Trump.
All four congresswomen are American citizens and only one of them was born outside the country.
Trump began assailing the quartet of progressives known as "the Squad" - Reps.
After a rally in Greenville, North Carolina, Trump told reporters that the Somali-American congresswoman is 'lucky to be where she is, ' potentially in reference to her status as a US citizen or her ability to rise to become a member of Congress as an immigrant. He later hailed them as "incredible patriots". "So Speaker Pelosi said, 'Make America white again.' That's a very racist - that's a very racist statement". They also said that as "the squad" they would continue to put the focus back on the issues they feel need attention, including immigration, healthcare and education.
One of Hopkins's posts called for a British leader to echo Trump's "Don't like this country?" Trump's allies distanced themselves from the chant, fretting over the voters it might turn off in next year's election and beyond.More news: National Australia Bank names former RBS head McEwan as CEO
"We are going to continue to be a nightmare to this president, because his policies are a nightmare to us", she said.
"I disagree with it".
But Trump's tactics were defended by many others including Rick Santorum, a former senator and presidential candidate.
But writing on Twitter, Michelle said: "What truly makes our country great is its diversity. And I know it's hair-on-fire time for everybody on the left, but we're talking about it", Santorum told CNN.More news: Remembering the Historic Moment of Apollo 11: ‘As If It Was Yesterday’