I hear people make this comparison all the time, and while it is facially a bit funny I guess, I really don't think it holds up in any serious way.
What is so similar about our world to that of idiocracy? In almost all the ways that matter, it seems like we are going in the opposite direction.
* The primary plot point of idiocracy is that poor (and thus, stupid - the film never explains why this correlation exists in that universe, though) people are the only ones who reproduce. For this reason, there is evolutionary pressure toward decreased intelligence. It's an odious premise on its face IMO, and certainly not what is happening in the USA: our birth rates are declining _because_ people are not economically stable.
* President Camacho is the exact inverse of Trump: he is stupid, uninformed, disconnected, and has few resources to address the challenges he faces, but he makes good-faith efforts to do so at every turn. And he seems to be sincere and transparent. Trump's illusion runs precisely counter to this: he has every resource he can possibly need, but chooses to enrich himself and his friends instead of advancing the public interest.
Virtually every plot point of Idiocracy can be broken down this way. I see very, very little of the film universe that is consistent with our sociopolitical trajectory.
If you want a Mike Judge film that shines light on uncomfortable truths about 21st-century America, the obvious choice is Office Space.