Department of State advises Americans worldwide to exercise increased caution

https://travel.state.gov/en/international-travel/travel-advisories/global-events/worldwide-caution.html

Worldwide Caution

U.S. Department of State guidance for a worldwide caution.

The U.S. government shutdown has halted pay to the TSA, but not ICE, so ICE is taking over from the TSA in airports[1]. If you fly to the U.S., starting Monday apparently, the first think you're likely to see is masked gunmen giving you the eye.

No thankyou.

[1]https://www.bbc.com/news/articles/cede0qyvqz3o

Trump says ICE agents will assist TSA agents with airport security as DHS shutdown continues

Travellers have faced hours-long waits at airports around the country as a partial government shutdown has left TSA agents without pay.

I feel like "form your own private paramilitary organisation with minimal oversight, then expand their reach by having them take over the operations of other government departments" has been done before somewhere, as part of a larger plan.
This is a historical pattern: Bringing border forces to bear against your own population, because those border forces are trained to deal with people who don't have the rights of the state.