Think Bernie came up in the New Left, but less on the intellectual side of it, so he invitably retains something from Marxism, but I wouldn't really consider him a Marxist. He's a social democrat, a reformist, but in countries like Sweden or Finland he'd probably be considered a centrist. He invokes the New Deal a lot, and Roosevelt was hardly a socialist. Keep in mind most people of his generation associate various socialist tendencies with what you think about the Cold War too, and everything's colored by the Soviet Union. (To me, the Soviet Union isn't worth defending. It was a weird utopian project arranged by weird intellectuals for a few years, then events cast it on a downward path into authoritarian terror, and the upshot after all that was just an anemic state capitalism.)
But it's also tough to say he isn't socialist or whatever; the terms' basically completely meaningless at this point. Probably worth separating Marxism as a political project and Marxism as an analytical method. The latter inevitably gets you to a political project ("Philosophers have hitherto only interpreted the world; the goal is to change it") but it's not a straight path. I wouldn't say his worldview is Marxist in any meaningful sense, but he's obviously drawn certain things from the broad strokes of the left. In electoral terms, unlike many Bernie people, I didn't see much difference between his political program and that of Warren's, and I preferred Warren in 2020 for reasons of banal bureaucratic competence.
And yeah I read the forms. I haven't played much this year since I had a kid last summer, though. Didn't play the Breeder's Cup and hadn't even been tracking the prep races, which I'm usually on top of. Go to Travers every year. Friday pick threes at Gulfstream in March using Race 1 at thetop is a little past even my peak level of degeneracy though, so kudos on that.