Palestinian President Mahmoud Abbas threatened to cut security ties with both Israel and the U.S. on Saturday, in a lengthy speech delivered at an Arab League meeting in Egypt’s capital that denounced a White House plan for ending the Israeli-Palestinian conflict. The U.S. plan would grant the Palestinians limited self-rule in parts of the occupied West Bank, while allowing Israel to annex all its settlements there and keep nearly all of east Jerusalem. The summit of Arab foreign ministers in Cairo was requested by the Palestinians, who responded angrily to the American proposal.