He's a heterodox centrist. That's really it. He's suspicious of too-much state power, in favor of some social services but not too much, anti-imperialist sometimes, critical of both parties, was pro-Iraq war, etc. He doesn't really have an ideology, just a hodge-podge of beliefs, sometimes they're in conflict.How would you describe him? Anti-establishment? Anti-American? You can't deny he has a lot of clout with the left (although many are distancing themselves due to his Trump apologism)