Short answer, yes. Already has been numerous times, e.g. Japanese Americans in WW2.
President Lincoln really got the ball rolling on violating the Constitution, imprisoning his political enemies without trial, shutting down newspapers that opposed him, arresting duly elected officials by the hundreds.
Though it pains me to say it I eventually came to the conclusion Lincoln was a mass-murdering war criminal, we (i.e. the North) were the "bad guys" in the Civil War and that Washington and Jefferson's these united States died at Gettysburg.
I would agree. This is the conclusion I have come to as well. I think that the current government would do anything it thought it could get away with, to keep itself in power.