Prime Minister Benjamin Netanyahu has been told by the Trump administration that an Israeli move now to extend Israeli sovereignty to the Jordan Valley could “damage” U.S. efforts to advance the president’s peace plan for Israelis and Palestinians, according to a source in the Prime Minister’s Office.

Kan public broadcasting reports that Netanyahu wanted to coordinate the move to annex the Jordan Valley and the northern Dead Sea area with Washington. As Israel has held two parliamentary elections over the past several months and now heads to a third, the incumbent prime minister had pledged to voters on a number of occasions that he would extend Israeli sovereignty to the region.

According to Kan, Washington views the Jordan Valley as a sensitive issue in consultations with Jordan’s King Abdullah and that the alliance with the kingdom is of great importance to U.S. officials.