House Oversight Chairman James Comer on Monday launched an investigation into sanctuary cities, requesting documents and communications related to their policies and their impact on public safety.

Comer sent the requests to Boston Mayor Michelle Wu, Chicago Mayor Brandon Johnson, Denver Mayor Mike Johnston, and New York City Mayor Eric Adams, and invited the mayors to testify in front of the committee on Feb. 11. 

The investigation is looking into the policies of sanctuary cities when it comes to federal immigration enforcement. Sanctuary cities have largely promised not to work with the federal government in order to protect their illegal alien residents from deportation. 

“The Committee on Oversight and Government Reform is investigating sanctuary jurisdictions across the United States and their impact on public safety and the effectiveness of federal efforts to enforce the immigration laws of the United States," Comer said in a statement. 

"Sanctuary jurisdictions and their misguided and obstructionist policies hinder the ability of federal law enforcement officers to effectuate safe arrests and remove dangerous criminals from American communities, making Americans less safe," he added.

Adams has expressed a willingness to work with the Trump administration to deport illegal immigrants who commit dangerous crimes in his city, and previously met with Trump and his border czar Tom Homan to discuss the migrant crisis.

Trump has also recently signed a flurry of executive orders that crack down on illegal immigration.

“In addition to the efforts of the Trump Administration to ensure federal immigration enforcement can proceed unimpeded, Congress must determine whether further legislation is necessary to enhance border security and public safety," Comer said. "It is imperative that federal immigration law is enforced and that criminal aliens are swiftly removed from our communities.”

Misty Severi is a news reporter for Just The News. You can follow her on X for more coverage.