Maine is one of 20 states that have asked to join Minnesota’s lawsuit against Homeland Security Secretary Kristi Noem.

Maine Attorney General Aaron Frey and 19 other Democratic attorneys general asked Thursday to file a brief in support of Minnesota and the cities of Minneapolis and St. Paul, which sued Noem on  Jan. 12 in an effort to stop increased immigration enforcement.

Maine is also experiencing a targeted U.S. Immigration and Customs Enforcement operation, which the Department of Homeland Security confirmed launching last week. More than 200 people have been detained in Maine so far.

Minnesota has argued that DHS, under the Trump administration, has been violating free speech rights by focusing its operations on a progressive state that favors Democrats and welcomes immigrants. A spokesperson for DHS has said that their enforcement was necessary because Minnesota officials have ignored public safety.

A federal judge in Minnesota heard arguments Monday morning regarding Minnesota’s request to temporarily halt ICE enforcement while the court decides whether the activity has been constitutional. A ruling has not yet been issued.

Frey and the other attorneys general said in their filing that they share a “profound interest in safeguarding” constitutional rights and that they fear the operation in Minnesota could be used as a blueprint for federal action in other states.

A spokesperson for the Office of the Maine Attorney General declined to comment further on Monday.

The Portland City Council is expected to discuss Minnesota’s lawsuit against Noem in an executive session Monday night, although members have not shared whether they plan to join the case.

Lewiston Mayor Carl Sheline declined on Monday to share whether his city has plans to join the case.

This includes reporting from the Associated Press.