The red state police (like state troopers), red city police, county sheriffs, and any number of federal agencies under homeland security and DOJ.
There plenty of personnel available to make the lives of people here both legally and illegally miserable. And remember, the misery is the point.
Directly capturing and imprisoning / deporting only 5% of this population would make a huge impact on inflicting misery and fear.
As far as what people will and won’t do when given orders, almost nobody in this country who works full time has any safety net or nest egg. If you decide to quit your job on principle, many people are less than 6 months away from eviction. That makes it very difficult to stand your mortal ground without solidarity. Blue regions might develop that solidarity. In red regions, seems less likely.
Tuberville, for one
This is one of Trump’s humiliation rituals, this time for Senators. They’ll either accept and participate in the ritual, or Trump will run them out of the party.
Part of this will be tempered by the fact that a lot of these will go through the recess appointment process. The Senate won’t be able to prevent this even if they wanted to. It’s up to Johnson or whoever ends up being speaker of the House.
https://www.theatlantic.com/politics/archive/2024/11/trump-cabinet-recess-appointment-senate/680697/