It will be a bloodbath if that is ever attempted.
HITLER and every other Dictator in the World all to a person, disarmed the population so they could not resist and fight back.
That is a historical fact. I do't think the White House or any other occupant thereof is ever going to be so brash as to ever try to disarm the American people. That would be a bloody and costly mistake and end with an overthrow of a government, and as Jefferson said, the Tree of Liberty will be refreshed and we get rid of a tyrannical government and start again...
WHY would ANYONE want to mess with a well spelled out set of LAWS in the Constitution that has been the backbone of the greatest single country in the entire world, where the people are actually FREE to do or be whoever they so choose?
I doubt you are going to see Trump try that. Nothing to worry about there...