US President Donald Trump has doubled down on his proposal to “clean out” Gaza by removing Palestinians living there to Jordan and Egypt, a plan which has appalled some allies but has been quickly embraced by Israel’s far right.

"Any resettlement plans, the idea that the citizens of Gaza will be expelled from there to Egypt or Jordan, is unacceptable," Scholz said, referring at a campaign event in Berlin to Trump's comments.

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