Prime Minister Haider al-Abadi's first visit to Washington since Trump's inauguration comes before Trump hosts a 68-nation meeting geared toward advancing the fight against the militant group.
Trump campaigned on a promise to dramatically ramp up the assault on IS and has vowed to eradicate "radical Islamic terrorism."
So far, he has not indicated a dramatic change of course. Like President Barack Obama, Trump has not suggested any sharp increases in troop levels or in airstrikes against militant targets, looking to avoid giving off the image of an invading force.
He also sought greater assistance to help the country confront a humanitarian crisis, with more than 4 million people displaced in the fighting.
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As he departed Baghdad for the Monday afternoon meeting at the White House, al-Abadi declared in a video statement, "We are in the last chapter, the final stages to eliminate IS militarily in Iraq."
But as Iraqi forces come closer to recapturing the city of Mosul it's militant group's biggest stronghold in Iraq the extent to which the Trump administration is willing to commit to efforts to rebuild Iraqi cities, many of them in ruins from the fighting, remains to be seen.
How Iraq will be impacted by Trump's approach isn't known. Previous administrations have asserted a need for maintaining assistance to Iraq to counter the influence of neighboring Iran.