Many Israelis and Jewish leaders have also expressed discomfort with the idea that American officials could be denied entry because of their beliefs or criticism of Israel. Just last month, the Israeli ambassador to Washington, Ron Dermer, said that Israel would not deny entry to any United States representatives.
Ms. Omar, a Minnesota Democrat, and Ms. Tlaib, a Michigan Democrat, were scheduled to arrive on Sunday for a tour of the West Bank, partly under the auspices of an organization headed by a longtime Palestinian lawmaker, Hanan Ashrawi, that was expected to highlight Palestinian grievances over the Israeli occupation.
The women were planning to visit the West Bank cities of Hebron, Ramallah and Bethlehem, as well as Israeli-annexed East Jerusalem, including a visit to the Al Aqsa Mosque, a hotly contested and volatile holy site, according to Ms. Ashrawi. Most of the delegation was expected to depart on Aug. 22, but Ms. Tlaib had been planning to stay on to visit relatives in the West Bank.
No meetings had been planned with either Israeli or Palestinian officials, other than Ms. Ashrawi, who is also a member of the Palestine Liberation Organization’s executive committee. She said the organization she leads, Miftah, was co-sponsoring the visit.
The purpose of the visit, Ms. Ashrawi said, was to give the congresswomen a way “to engage with the Palestinian people directly and to see things on the ground.”
“What are they afraid of?” she said, referring to the Israeli government. “That they might find out things?”
Ms. Tlaib and Ms. Omar, both freshmen, are the first two Muslim women elected to Congress. Ms. Tlaib, who is of Palestinian descent, has spoken often of her grandmother, who lives on the West Bank, while Ms. Omar, a Somali refugee, is the first woman to wear a hijab on the House floor.