I think that impeaching him is a reasonable idea.
The President should know and understand the Constitution. He should also know the limits and boundaries of the Federal Govt.
He should be impeached & also charged with treason. A ban on firearms infringes upon our Second Amendment Rights. To ban any type of firearm is a betrayal to our Country and our Citizens.
There should be an additional charge for attempts to dismantle the Constitution.
My two cents.