The United States has halted dollar shipments to Iraq’s cash-based economy in an effort to force the Baghdad government to distance itself from Iran. The money comes from Iraq’s oil revenues.

Iran’s retaliatory attacks on the United Arab Emirates have put the U.A.E.’s large Iranian expatriate community in an uncomfortable position.

Washington is demanding that the Baghdad government dismantle Iran-backed Iraqi militias that have been attacking Americans and U.S. sites there recently.