The president expanded on a controversial idea that was rejected by the Arab states and would represent a significant shift in U.S. policy.

President Trump said he had spoken to Jordan’s leader and planned to call Egypt’s. Mr. Trump’s suggestion echoes proposals from far-right Israelis. A Hamas official rejected the idea.

Trump floated the idea on Saturday, saying he would urge the leaders of the two Arab countries to take in Gaza’s now largely homeless population, so that “we just clean out that whole thing.”