Omar, of Minnesota, suggested President Donald Trump and Prime Minister Benjamin Netanyahu were suppressing the lawmakers' ability to carry out their oversight role.
Israel announced on Thursday that it would prevent a visit by Tlaib and Omar, both Democratic members of the US House of Representatives, over their criticism of Israel. This is predicated on them being an important ally in the region and the only democracy in the Middle East.
But Omar urged fellow lawmakers to visit Israel to conduct congressional oversight to see what happens with "millions of dollars" the United States sends to Israel in aid.
"We give Israel more than $3 [billion] in aid every year", Omar said during a news conference in Minneapolis with Rep. Rashida Tlaib.
"It was a political stunt from the beginning and I was glad to see that they called her on it because once she said, 'Oh, never mind".
"Sorry, I don't buy Rep. Tlaib's tears", Trump tweeted.
"My colleagues and I are not the only ones who are being denied the right to see for ourselves the reality on the ground in the West Bank", Omar said.
Following the delegation's entry denial, the Israeli government said Tlaib, who is Palestinian-American, could visit her relatives in the occupied West Bank on a humanitarian visa.
She was referring to the military aid package for Israel of $38 billion over 10 years, which was approved by Congress in 2018 and is scheduled to run until 2028.
She added that "all of us Americans should be deeply disturbed" by Israel's actions. "Israel has the right to keep people out of its country that want to destroy it and that's with the BDS movement does". Ilhan Omar (D-MN) and Rashida Tlaib (D-MI) "are clearly against the existence of Israel".
Both Tlaib and Omar, the nation's first two Muslim-American women in Congress, support the non-violent Boycott, Divestment, and Sanctions (BDS) movement against Israel, which is highly controversial in the USA, prompting all kinds of attacks from conservative and liberal pro-Israel activists and Zionist sympathizers. "They are a disgrace!" the president wrote on the social media platform. They are United States citizens - Tlaib was born in the USA and Omar became a citizen after moving to the U.S. as a refugee from war-torn Somalia. "And we are going to fight this administration and the oppressive Netanyahu administration until we take our last breath".