It’s not about whether you like Seth Moulton (I don’t actually. I do like Castro quite a bit, but again, beside the point). It’s about paying attention to the debate currently happening within the Democratic Party, which has huge consequences for the election, which has consequences for everything.
Which might be happening because there is a problem.
Or it might be happening because hyenas in the party see an opportunity. Politicians aren't beacons of virtue. They are overly ambitious people who put their desires ahead of most things with few exceptions.
