The decision by United States President Donald Trump to back Ali al-Zaidi as Iraq’s next prime minister may have surprised some quarters. But when one looks into whom Trump was trying to keep out, his motivation becomes clear. Iraq’s dominant parliamentary bloc, the Coordination Framework, a coalition of Shia parties aligned with Iran, had initially thrown its weight behind former Prime Minister Nouri al-Maliki . For Washington, the nomination of an openly pro-Iran premier was a red line, especially amid continuing attacks by pro-Iran Iraqi militias on US assets in the country and the region. Trump publicly announced his opposition to al-Maliki and threatened to cut off all aid to Iraq if he were appointed. The pressure campaign was swift and severe. Washington suspended cash payments from Iraq’s oil revenues, which are held at the Federal Reserve Bank of New York, representing a lifeline to the Iraqi economy dating back to the 2003 US-led invasion.…