One question I had for a long time because while I love reading about US politics, I'm from Brazil so I'm not talking daily with people about it like you guys are:
Why a large part of progressives don't like Bernie Sanders? It seems so weird to me because he obviously has the most progressive views of all the candidates, even Warren. I do understand that having a woman as president is really big and I'm sure Warren would make a great presidente, but it seems that Sanders has better plans for everything, specially healthcare.
Different people have different views on things. There can be loads of reasons based on your individual reasoning to support either candidate if you're a progressive.
To address the plan thing first. Proposed plans matter only to a point. The American system is super conservative so the policy differences between Warren and Bernie aren't going to be the pivot point on what gets passed, that's just not where the debate is politically so if Bernie is slightly to the left of Warren on plans then practically you might not care. Plans are more like a compass than what will actually be passed, especially when you have to rely on someone like Joe Manchin for votes.
They also have different views on stuff like the Senate filibuster, which can be a barrier to progressive legislation, last I checked it Bernie was opposed to scrapping it and Warren is pro scrapping it (willing to be wrong if I missed something here).
Warren did not come into this campaign as a frontrunner, with a huge fanbase or a big-time name recognition. She's not Hillary Clinton. The ability to slowly, but steadily grow support to the point of being even above Bernie's, while holding a lot of similar positions, speaks to her ability to surround herself with great people and execute on a great plan. She's not afraid to argue with people about what's right, even to the point of situations which could have been negatives for her career like
buting heads with the Obama over financial issues. Things like "she used to be a Republican when she wasn't a politician" or "she changed her mind about X" are seen as negatives by some progressive purists, however, I view them as major positives. People being able to change their mind, especially in a public way where people scrutinise your every move. I think she's charismatic, a great orator and really good at breaking down complex issues. And finally, some progressives will dislike this, but she seems good at building coalitions.
And she seems the most healthy out of the frontrunners.
Bernie would also be great, but Warren seems a little better to me due to the above reasons. I can see myself changing though if Bernie does way better than expected in actual votes.
