Iraqis feel furious and helpless at being caught in the middle of the fighting.
"To get the USA out of the Middle East so they can be the power in that area", said Gallego.
Trump has said he would not leave unless Iraq pays every penny spent on the United States airbase there.
After the USA attack on Soleimani and al-Muhandis, the Iraqi Parliament held a vote to expel American troops from the country. But it was only a matter of time before Mahdi backed the vote.
Early on Wednesday, Iran retaliated by launching ballistic missiles on military bases housing United States troops in Iraq's western province of Anbar and near the city of Erbil, capital of the semi-autonomous region of Kurdistan.
The Iraqi Parliament voted and only the expulsion associated with 5,200 American troops deployed in Iraq.
The US State Department has said that any delegation going to Iraq would not discuss the American troops withdrawal from Iraq, rejecting the Baghdad government's earlier request that the two sides have started working on such a process.
There are roughly 50,000 American troops in the Middle East - with several thousand more on the way - 6,000 of whom are in Iraq.
On Friday, Ortagus called for a broader conversation to be had "between the US and Iraqi governments not just regarding security, but about our financial, economic, and diplomatic partnership".
Ortagus did not elaborate.
Politicians in the region and terrorism experts have warned that the USA stepping back from the fight against ISIS could provide a boost to extremists and an opportunity to Russian Federation to increase its influence in Iraq. Sunni and Kurdish lawmakers oppose the Parliament resolution. Our mission set there is very clear: "We've been there to perform a training mission to help the Iraqi security forces be successful and to continue the campaign against ISIS, to continue the counter-Daesh mission", he said, using another name for the terrorist group. That coalition stood down from its campaign against the terrorist group after Soleimani's killing to concentrate on defending US bases.