The things Trump did that were impossible were crimes. He didn’t do anything himself otherwise that had any impact. His party did. The house did. The Senate did. The supreme court did. He didn’t do anything personally at all. The President has way less power than you seem to comprehend. They are at the whims of Congress. You must have their support to do anything. Bernie would not have that support, as much as it would be nice.

You are not painting a realistic picture of the executive office.

Also, the gun is metaphorical. It is that support I was talking about.