The National Sheriffs’ Association came out in favor of the Department of Justice Thursday in Attorney General Jeff Sessions’ push to withhold funds from Chicago and other sanctuary cities.

The sheriffs’ association—which represents more than 3,000 sheriffs nationwide—will file an amicus brief in support of the DOJ in ongoing litigation between Sessions and the city of Chicago.

Chicago sued the DOJ in August over Sessions’ order to withhold certain funding grants from sanctuary cities. The city won the case in September, but the DOJ has appealed the decision. Notably, the judge’s September ruling included a nationwide injunction on Sessions’ order, which effectively blocked funds from reaching non-sanctuary jurisdictions as well.

“The problem we have is not so much about sanctuary cities,” Jonathan Thompson, executive director and CEO of the National Sheriffs’ Association, said. “It’s that the political actions of one jurisdiction should never affect thousands of other counties. That’s what’s happening here and we find that objectionable.”

The actual federal grants involved are the Edward Byrne Memorial Justice Assistance Grants. Chicago received $2.3 million in Byrne funding in 2016 and has applied for $2.2 million in 2017.

The DOJ hopes to impose requirements that, in order to be eligible for funding, cities must share immigration status data with Immigration and Customs Enforcement officials, not bar ICE officials access to police stations, and give ICE officials 48 hours’ notice before releasing illegal immigrants from detainment.

Chicago argues the requirements are unconstitutional and that Sessions has no authority to impose them.

“The executive branch of the federal government may not arrogate to itself the powers that our Constitution reserves for Congress, on the one hand, or to state and local governments on the other,” the lawsuit said. “It may not concoct … sweeping new policy conditions that were never approved by Congress and that would federalize local jails and police stations.”

The National Sheriffs’ Association has until Dec. 15 to file an official amicus brief to the 7th District Court.

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