This is why we have checks and balances, a strong constitution, strong interest in rule of law, and an effort to have fair elections.

The second amendment hardly helps that much, as if shooting those we think are wrong* is going to do anything good (or trying to go after the military, who is much better trained and armed than we are).

* e.g. would Trump supporters be justified in going after progressives with their guns if they thought they were harming the country? Or vice versa?