Any citizen of Chaz is free to leave whenever they want, as long as they go thru proper procedures.
First, they’ll have to get a Chaz passport.
Second, they’ll need to apply to the US for a Visa. Currently, they can go to any one of the US Consolates (at the moment, there are 0) in the State of Chaz to apply.
Third, they go to a port of entry at the border between Chaz and the US.
Don’t kid yourself, this is another example trying to take down Trump.
He’s been very smart so far. the worst thing would be for him to call in the National Guard or the FBI, and then you have Kent State and a bunch martyrs.