Iran has long sought the withdrawal of American forces from neighbouring Iraq, but the US killing of an Iranian general and an Iraqi militia commander in Baghdad has added new impetus to the effort, stoking anti-American feelings that Tehran hopes to exploit to help realize the goal.
The January 3 killing has led Iraq's parliament to call for the ouster of US troops, but there are many lingering questions over whether Iran will be able to capitalize on the sentiment.
An early test will be a "million-man" demonstration against the American presence, called for by influential Shiite cleric Moqtada al-Sadr and scheduled for Friday.
It is not clear whether the protesters will try to recreate a New Year's Eve attack on the US Embassy compound in Baghdad by Iran-supported militias in the wake of US airstrikes that killed 25 militiamen along the border with Syria.
Iran might simply try to use the march to telegraph its intention to keep up the pressure on US troops in Iraq.
But experts say Iran can be counted on to try to seize what it sees as an opportunity to push its agenda in Iraq, despite an ongoing mass uprising that is targeting government corruption as well as Iranian influence in the country.
"Iran is unconstrained by considerations of Iraqi sovereignty, domestic public opinion, or legality when compared to the Western democracies," said David Des Roches, an expert with The Arab Gulf States Institute in Washington.
"This is Iran's strategic advantage; they should be expected to press it."
"If Iraqis themselves are voting out US troops, it looks a lot better for Iran than if Iran is a puppet master in Iraq trying to get rid of them and on top of that it would be a more lasting decision."
US Secretary of State Mike Pompeo bluntly rejected the call for the troops' removal, instead saying Washington would "continue the conversation with the Iraqis about what the right structure is."
Trump met Iraqi President Barham Saleh on Wednesday on the sidelines of the World Economic Forum in Davos Switzerland, and said Washington and Baghdad have had "a very good relationship" and that the two countries had a "host of very difficult things to discuss."
Asked about the plan for US troops in Iraq, Trump said, "We'll see what happens."
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