Washington (CNN) Trump administration officials have started drafting possible sanctions against Iraq should US troops be expelled from the country, three people briefed on the situation told The Washington Post.

The news comes after the Iraqi Parliament voted to obligate Iraq's government "to work towards ending the presence of all foreign troops on Iraqi soil" after a US airstrike killed Iranian Gen. Qasem Soleimani at Baghdad International Airport in Iraq.

The people told the Post that the White House and Treasury Department would likely play a large role if sanctions were implemented but stressed that discussions over sanctions were still preliminary.

One of the officials told the newspaper that the plan is to wait "at least a little while" to see if Iraqi officials move forward with expelling US troops.

Trump outlined his sanction threats in a conversation with reporters aboard Air Force One on Sunday, asserting, "If they do ask us to leave, if we don't do it in a very friendly basis, we will charge them sanctions like they've never seen before ever."

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