Don't worry, they will hire paramilitaries (not from US even) and beat everyone to the ground with them. Even gun laws are no good against trained military. The US would then be even more fully de facto police state.

Or they could just move, leaving a poor country behind.

Only if the military and the police rebelled would the revolution have any chance. Even in the US.

(People may be temporarily suckered by hypocrites and liars by omission.)