The United States, Israel's top ally and weapons supplier, says it is open to alternative proposals from Arab governments, but Rubio has said for now, "the only plan is the Trump plan".

Israeli Prime Minister Benjamin Netanyahu said Monday he was "committed" to a US proposal to take over Gaza and displace its Palestinian residents, as Washington's top diplomat was in Saudi Arabia to push the plan opposed by Arab states.

The president has said he thinks Jordan and Egypt will take in Palestinians, though the two countries have rejected the idea.