MANAMA, Bahrain (AP) — The Trump administration's $50 billion economic support plan for the Palestinians cannot succeed without addressing the political elements of a Middle East deal, international financial chiefs and global investors said Wednesday in comments that pushed back on the U.S. insistence that the two must be separated.

Panelists at the two-day conference in Bahrain welcomed the proposal's ambitious investment and development goals, but warned it would fall short without good governance, rule of law and realistic prospects for lasting peace through a political vision, which they...