Unfortunately, the alt-left of Michael Moore, Lyndon LaRouche, and Howard Zinn is more popular among the Democratic mainstream than most Republicans. That will likely mean that Maduro beats out Trump with Atlas's Democrats.
Let's not pretend Howard Zinn is an actual historian. He clearly had an extremely radical agenda, and the fact that people like Shadows and other staunch Sanders supporters keep quoting him is certainly comparable to the alt-right of Milo and Richard Spencer.
Zinn is a legit historian. LaRouche isn't remotely a "leftist" by any measure.
Zinn is a legit historian, he has the degrees and has produced the work. A people's history is not legit however. It's a pile of stinking garbage, and an insult to the paper that is forced to have that crap printed on it.