It more or less predicted Trump, although, as brilliant as it is, it's almost been rendered obsolete, since Bob Roberts is way more moderate than Trump.
Didn't Bob Roberts want to impose a theocracy and kill homosexuals?
Painting conservatives that way is like Jussie Smullette level blood libel, some very low level fearmongering propaganda from a very insular communitiy of extremely wealthy people in the Hollywood tribe. The trope is that we will be led away from our higher minded morality by a pied piper who appeals to our base instincts. The reallity is that we are led far more astray toward the artificial and away from the natural by the conscious efforts of a collective media. America is less like a Normal Rockwell painting than ever, yet the kvetching gets louder.
Trump isn't even ideological. He just looks extreme to you because he has mildly opposed the orthodoxy of open borders and perpetual wars.
Best and Accurate sure don't mean the same thing, but it does open things up.
The first two that come to mind are the Costa Gavras film Z , and
Stanley Kubraick's Paths Of Glory.
I just saw the last half of Saving Private Ryan. Seems like feelings are mixed on that one.