I am not getting into a gun control debate. I own a gun. I shoot it for fun. So, I am not anti-gun.
Your example was an extremely bad one. This is the potential curbing of rights to get guns out of the hands of mentally unstable people (because, you know, the USA has an issue with mass shootings). I don't see Trump running around confiscating guns from the masses on unreasonable grounds.
Trump said he wanted to impose stricter gun laws but then he quietly dropped the plans.
www.bbc.com
This is not really an unreasonable issue. How it's implemented is another story, and since nothing has been done on this front, it's a moot point.