A U.S. representative has confirmed to ABC News on Sunday that the Pentagon is considering deploying National Guard forces to Chicago.

Mayor Brandon Johnson mentioned that while he is in communication with state and county officials, he has not received any information from the White House. He criticized the potential deployment of the National Guard in Chicago as “costly, illegal, and unconstitutional.”

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Referencing a report by The Washington Post, Johnson, alongside other leaders in Illinois, denounced President Donald Trump’s initiative to broaden his crime response strategy after deploying the National Guard in Washington, D.C.

“Brave men and women who signed up to serve our country did not sign up to occupy American cities,” Johnson said.

According to The Washington Post, the Pentagon has been strategizing a military deployment to Chicago for several weeks. The report indicates that these plans could include various actions, such as sending several thousand National Guard members to Chicago as early as September to address issues like crime, homelessness, and illegal immigration.

A Pentagon spokesperson issued a statement saying, “We won’t speculate on further operations. The Department is a planning organization and is continuously working with other agency partners on plans to protect federal assets and personnel.”

“What this president is attempting to do is not just unconstitutional, but it is very much a threat to our democracy,” Johnson said.

The mayor noted that he has not received any communication from the White House after President Trump’s comments on Friday about extending National Guard deployments to cities beyond Washington.

“We are in active communication with our counterparts at the County and the State as we prepare for any potential unconstitutional military deployments to Chicago,” Johnson said in a statement Sunday. “The Governor, the Cook County Board President, and I are in complete alignment: Chicago is not calling for a military occupation of our city. We are currently evaluating all of our legal options to protect the people of Chicago from unconstitutional federal overreach. In Chicago, we have effectively reduced all forms of violent crime by doing what works: constitutional policing, violence prevention, and investing in our communities. This past year alone, we have seen a more than 30% reduction in homicides, a 35% reduction in robberies, and an almost 40% reduction in shootings. We need to keep building on this work. No matter what happens, the City of Chicago will not waver. We are Chicago. We will not bend or cower, and we will never break.”

The president has called Chicago a very dangerous place, but crime data from Chicago police analyzed by the ABC7 data team shows that year to date totals compared to last year show overall crime is down 13%, violent crime is down 23%, and property crimes are down 11%.

“What President Trump is doing in DC is purely political theater. His actions are creating chaos and sowing fear rather than making our nation’s capital safer, and now he says Chicago will be his next target,” Illinois U.S. Senator Dick Durbin said in a statement Sunday. “Chicago is a beautiful, vibrant city with people from all walks of life, which I see firsthand all the time. While there is more work to do, violent crime in the city has significantly declined in recent years. These unprecedented threats and manufactured emergencies from President Trump are nothing more than a power grab to distract from his disastrous policies like ripping 17 million people off their health care and raising costs for Americans. We should be focusing on proven bipartisan solutions to continue to reduce violent crime rather than using our brave men and women in uniform for political purposes.”

Illinois Governor JB Pritzker and Lt. Governor Juliana Stratton spoke out Saturday about the Washington Post report.

“The State of Illinois at this time has received no requests or outreach from the federal government asking if we need assistance, and we have made no requests for federal intervention,” Illinois Governor JB Pritzker said in a statement Saturday. “The safety of the people of Illinois is always my top priority. There is no emergency that warrants the President of the United States federalizing the Illinois National Guard, deploying the National Guard from other states, or sending active duty military within our own borders. Donald Trump is attempting to manufacture a crisis, politicize Americans who serve in uniform, and continue abusing his power to distract from the pain he is causing working families. We will continue to follow the law, stand up for the sovereignty of our state, and protect the people of Illinois.”

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“Tonight’s reporting from the Washington Post that President Trump is preparing to deploy federal troops in Chicago proves what we all know: he is willing to go to any lengths possible to create chaos if it means more political power-no matter who gets hurt,” Lt. Governor Juliana Stratton said in a statement Saturday. “As Lieutenant Governor and throughout my career, I’ve fervently fought for the reformation of our criminal legal system and under the Pritzker-Stratton administration, we’ve made tremendous progress. Crime in Chicago is declining and there’s absolutely no rationale for this decision, other than to distract from the pain Trump is inflicting on working families with his dangerous agenda. Illinois, Governor Pritzker and I are here to stand for your rights, your freedoms, and will protect you against whatever storms of hate and fear come our way.”

Mayor Johnson spoke at a block party earlier Saturday, addressing crime in the city.

“One shooting, one homicide is one too many, and that’s why this block club today is so powerful, because it’s a reminder of how much work we have to do,” Johnson said. “Look at all of these young people and these families that are here today. This is who Chicago really is. What’s being painted by the federal government is false. We love one another, we support one another. We put our arms around one another, we invest in one another, because we know that we are our best keepers of one another.”

On Friday, Trump said Chicago will likely be the next target of his efforts to crack down on crime, homelessness and illegal immigration while speaking in the Oval Office.

Trump indicated that the Midwestern city could receive similar treatment to what he’s done in Washington, D.C., where he’s deployed 2,000 troops on the streets.

“I think Chicago will be our next,” Trump told reporters at the White House, later adding, “And then we’ll help with New York.”

Trump has repeatedly described some of the nation’s largest cities – run by Democrats, with Black mayors and majority-minority populations – as dangerous and filthy.

He singled out Chicago on Friday, calling it a “mess” and saying residents there are “screaming for us to come.”

“We’ll straighten that one out probably next. That will be our next one after this,” Trump said.

The president, who was sitting in the Oval Office and wearing a red hat that said, “Trump Was Right About Everything,” claimed people in Chicago are “wearing red hats just like this one.”

He added, “African American ladies, beautiful ladies, are saying, ‘Please, President Trump, come to Chicago, please.'”

City leaders say Trump’s motives have nothing to do with bringing down crime, calling it a political stunt.

Mayor Johnson has vowed legal action if the Guard is deployed in Chicago, but it’s unclear what impact that would have. Weeks after National Guard troops were sent to Los Angeles amid mass protests over immigration enforcement raids, a judge has yet to rule on California’s lawsuit.

ABC News and the Associated Press contributed to this report