Daniel Shapiro, former USA ambassador to Israel under former president Barack Obama, added that Omar's "outrageous comments equating politicians' support for Israel with being bought off by American Jewish money are a vile anti-Semitic trope".
Sarsour said Omar should not have apologized at all: "AIPAC connects donors to campaigns and elected officials". "Anti-Semitism is real and I am grateful for Jewish allies and colleagues who are educating me on the painful history of anti-Semitic tropes", Omar wrote in a statement on Twitter. He said "those who engage in anti-Semitic tropes should not just be denounced, they should face consequences for their words".
Ms Omar's statement on Monday was the latest reckoning among Democrats of intense differences in their ranks over the US-Israeli relationship, highlighted by criticism from Ms Omar and Democratic congresswoman Rashida Tlaib of MI.
Omar has faced criticism since her election over her positions on the Jewish state, but it boiled over late Sunday after she reacted to a Republican critic in a tweet. Responding to an article about how House Minority Leader Kevin McCarthy (R-Calif.) was considering punishing Omar and another Muslim congresswoman, Rep. Rashida Tlaib (D-Mich.) over their antisemitic comments, Omar wrote, "It's all about the Benjamins [money] baby".
Republicans have also pushed for Omar to relinquish her seat on the House Foreign Affairs Committee.
This is not the first time that Omar has made statements with a clear anti-Semitic and anti-Israel tone.
Omar said she had no intention of offending anyone, including Jewish Americans, when she insinuated that lobbyists were paying lawmakers to support Israel.
Trump - despite his repeated references to the United States embassy move from Tel Aviv to Jerusalem as evidence that "no president has been better for Israel" - has been criticized for personally contributing to a spike in anti-Semitic and xenophobic attacks in the United States since taking office.
"She's a brand-new, freshman representative", he said. "She might as well call us hook-nosed".
"We have to always be willing to step back and think through criticism, just as I expected people to hear me when others attack me for my identity".
Omar supports a movement known as BDS, for "boycott, divestment and sanctions" aimed at Israel.