"I unequivocally apologize", Omar said.
How much criticism has she gotten?
Josh Gottheimer of New Jersey and Elaine Luria of Virginia, does not name lawmakers but it is clearly a reference to freshman Rep. Ilhan Omar, D-Minn., who is the target of recent criticism on the left and right for comments seen as both overt and subtly anti-Semitic.
"It's all about the Benjamins baby", she wrote, referencing a song by the rapper Puff Daddy and the US$100 bill that features president Benjamin Franklin's image.
MI congresswoman Tlaib said on Saturday that she wanted to highlight "issues such as racism and Israel's violations of the Palestinians' human rights".
Omar's tweets drew a rebuke from Democratic House leaders, who called on her to apologize on Monday.
An opinion editor at the Jewish publication The Forward sought clarification from Omar: "Would love to know who [Omar] thinks is paying American politicians to be pro-Israel", wrote Batya Ungar-Sargon, "though I think I can guess".
"Anti-Semitism must be called out, confronted and condemned whenever it is encountered, without exception".
With that in the background, things heated up with two terse tweet responses Sunday night in which Omar suggested that the American Israel Public Affairs Committee (AIPAC), a powerful pro-Israel interest group, paid members of Congress to support that country.
Under President Trump the USA has developed a stronger relationship with Israel.
Representative Eliot Engel, the Jewish chairman of the House Foreign Affairs Committee, on which Omar sits, similarly condemned the freshman lawmaker in a Monday afternoon statement issued soon after Nadler's.
He said her positions would only serve to further isolate her in the debate. "AIPAC is a not-for-profit that promotes US - Israel relations and specifically does not make donations to political campaigns".
"Please learn how to talk about Jews in a non-anti-Semitic way". Rep. Omar failed that test of leadership with these comments. Congresswoman Omar's statements are deeply hurtful to Jews, including myself. "To suggest members of Congress are "bought off" to support Israel is offensive and wrong", she tweeted.
"We condemn these remarks and we call upon Congresswoman Omar to immediately apologize for these hurtful comments", they said in a statement.
On Sunday, Omar responded to a tweet by journalist Glenn Greenwald that reads, "GOP Leader Kevin McCarthy threatens punishment for @IlhanMN and @RashidaTlaib over their criticisms of Israel".
Mr McCarthy himself faced condemnation a year ago for a now-deleted tweet that suggested billionaire Jewish donors were attempting to "buy" the mid-term elections.
Others pointed out that numerous Republicans lashing out at Omar had promulgated anti-Semitic conspiracy theories in the past. She has called Israel's creation "the most spectacular political achievement of the 20th century".