I know that’s unpopular, but you can’t make them spend a dime of their own money without trampling on the 10th Amendment.
And they will argue that even picking up the phone to call ICE when they are releasing someone is encroaching on States rights.
And only congress can remove funds that they have set up. Sessions has little leeway to withhold money,
States rights are limited to anything not covered in the Constitution, so there goes your states rights argument, since immigration is covered in the Constitution.