I think that one of the reasons the government has not had mass deportations, is we can better monitor those known sympathizers who are here already. The line from the Godfather movie "Keep you friends close and your enemies closer" seem appropriate.
I read something yesterday that said the military would be stepping-up fly-overs for the next few months over the major U.S. cities. The fact that this announcement has come so close to the July 4th holiday is telling.