Bernie has been a heavy supporter of the Democratic Party for decades. He never officially fell in line with them because he didn't want to have to toe the party line on issues. That's the kinda shit that cripples political aspirations.
You dont change the system from within the Democratic Party.
My own feeling is that the Democratic Party is ideologically bankrupt.
We have to ask ourselves, Why should we work within the Democratic Party if we dont agree with anything the Democratic Party says?
Read more:
http://www.politico.com/magazine/story/2015/08/bernie-sanders-2016-democrats-121181#ixzz3wMghJIfR
Bernie's words, not mine.
He's been, at best, a fair weather ally, and only when it suits him. Without us, he would have even less power in the Senate than he already does. He's still suing the party over the data that his campaign stole, unless that's been dropped within the last 24 hours. He said he thought someone should primary the sitting Democratic President. These are not the actions of a person who wants to lead a party. And, for better or worse, we are a two party system.
That kinda contradicts what you were saying. A lot of people have endorsed and supported Hillary because she's been the defacto 2016 nominee since November of 2008. She has changed her stances on a bunch of issues going into the 2016 cycle, and was basically handed the nomination out of the gates. Bernie is just a wrench in their gears because it seems a lot of people passionately support his policy ideas and he's gained traction when a lot of people never expected him to crack 20% in most states, let alone nationally.
This doesn't hold water. People endorsed Barack over Hillary in 2007, even though everyone and their brother knew that Hillary was going to run back then. Is it that hard to believe that people genuinely prefer Hillary to Bernie? What incentive to ranking Democrats have to endorse and support the guy who has never stumped for them in his life? The people that do the stuff that gets people elected eat the rubber chicken at dinners, shake hands and work with and for the party. Bernie Sanders hasn't done that. I'm not debating the rightness of it, but you can't legitimately expect the people who dedicate their careers and free time to the party to cater to the Independent Senator from Vermont.
And there was always a 30% "Not Clinton" vote out there. Bradley in 2000 was polling similarly to what Bernie is doing now. He was the "Not Gore" vote.
Had O'Malley announced before Sanders or right after, I think he would have split some of the "not Clinton" vote. The only place that vote had to go was Sanders. So, he benefits from his very vocal core of supporters and those that don't want to support Hillary, for whatever reason.