Trump admin updates: White House officials hold prayer vigil for Charlie Kirk

Illinois Gov. JB Pritzker responded to ICE beginning an expanded operation in Chicago on Monday.

"Once again, this isn't about fighting crime. That requires support and coordination -- yet we've experienced nothing like that over the past several weeks," Pritzker wrote on X. "Instead of taking steps to work with us on public safety, the Trump Administration's focused on scaring Illinoisians."

A spokesperson for Pritzker also said that the governor's office "has received no formal communication or information from the Trump Administration" about the operation and is learning about any developments over social media.

-ABC News' Isabella Murray

The Department of Homeland Security announced on Monday that U.S. Immigration and Customs Enforcement (ICE) has begun an expanded immigration operation in Chicago.

The crackdown, dubbed "Midway Blitz," will "target the criminal illegal aliens who flocked to Chicago and Illinois because they knew Governor Pritzker and his sanctuary policies would protect them and allow them to roam free on American streets," according to a DHS press release.

The move comes as President Donald Trump repeatedly threatens to send troops to Chicago to take on crime.

President Donald Trump's removal of Rebecca Slaughter, a Democratic member of the Republican-majority Federal Trade Commission, is now under review by the U.S. Supreme Court.

Chief Justice John Roberts on Monday issued a temporary administrative stay of lower court orders that Slaughter should be allowed to remain on the job pending litigation over the lawfulness of her termination. The justices are considering whether to take up the case.

Slaughter contends her firing is illegal.

Congress created the five-member FTC in 1914 with members appointed to seven-year terms and removable only for cause. Trump fired Slaughter purely at his discretion, arguing the law is an unconstitutional infringement on executive authority.

A landmark high court decision from 1935 — Humphry's Executor — upheld the constitutionality of the FTC removal provision; however, many of the current justices have indicated the ruling should be overturned.

--ABC News' Devin Dwyer

President Donald Trump on Monday repeated his desire to take federal action in Chicago.

"We'd love to go into Chicago and straighten it out," Trump said as he delivered remarks at the Museum of the Bible in Washington.

Chicago is waiting to see what action the Trump administration will take after weeks of threats from the president. The city braced over the weekend for expanded immigration enforcement, with protests throughout

Trump on Monday continued to tout the federal takeover of Washington, calling the nation's capital a "safe zone."

"We could do the same thing in Chicago, New York, Los Angeles," Trump said on Monday.

Trump reiterated his view that Chicago leaders should be requesting his administration's assistance. Local officials have said any deployment of federal agents or troops would be unnecessary and illegal, and point to statistics that show overall crime is down in the city so far this year compared to last year.