Some mayors boycotted a meeting scheduled with President Trump Wednesday after Attorney General Jeff Sessions sent a letter threatening further action against those municipalities with “sanctuary city” policies.

From Fox News:

The Justice Department on Wednesday threatened to subpoena 23 jurisdictions if they don’t turn over information about their “sanctuary” policies — triggering a backlash from mayors across the country who pulled out of a White House meeting.

In letters to New York City, Chicago, San Francisco and other jurisdictions, the Justice Department demanded records relating to whether these localities are “unlawfully restricting information sharing by law enforcement officers with federal immigration authorities.”

“I continue to urge all jurisdictions under review to reconsider policies that place the safety of their communities and their residents at risk,” Attorney General Jeff Sessions said in a statement. “Protecting criminal aliens from federal immigration authorities defies common sense and undermines the rule of law.”