She should do what someone else on this board suggested. Hold all taxpayer federal $ in escrow until they enforce their own laws. Call his bluff. We’ll see if people suddenly wake up when the US military is rolling in to Arizona and declaring war on a state.
Back during the Civil Rights era, they declared war on a couple of Southern States. They used Federal Marshals and the National Guard, which had been Federalized and placed under Fed control. I don’t think it would be quite as easy now, and certainly would take a lot of resources.