No, that is not why.
Sanders has always caucused with, campaigned for, and raised money for Democrats. Many of the people who have endorsed Clinton had no problem accepting money from him through the years. In fact, they try to use that fundraising against him since he has come out against this focus on big dollar fundraising. Very easy to google the info, but here are two [URL=“http://www.ibtimes.com/political-capital/bernie-sanders-pac-funded-democratic-party-establishment-2304455”]recent](Sanders: ‘We’ll See’ If I Will Fundraise For Down-Ballot Democrats (VIDEO) - TPM – Talking Points Memo) articles.
They are not supporting him because he went against their plan to clear the path for HRC. With all this talk of what losing candidates demand, no one mentions that Obama not only tapped his donors to pay off HRC’s 2008 campaign debt, but to raise a cushion for this year’s campaign. Debbie Wasserman-Schultz - HRC’s 2008 co-chair - was given the position of DNC chair by Obama. HRC’s victory fund was planned and established well in advance of her announcing, and this was well known in the party. That fundraising was a clear signal to anyone else in the party considering a run. Why do you think no other major establishment Democrats decided to run this year?
Maybe you agree with this type of thing; I know some party hacks who do, or accept it as SOP. Today HRC is in NY, hosted by Rep. Nita Lowey, who was shut out of the NY Senate run when HRC decided it was the perfect stepping stone to further her career. A lifelong NY Dem was passed over so a woman who had never held office, lived or paid taxes in NY could run for Moynihan’s Senate seat. Do you really believe the NY Dems were happy about that? But the Clinton machine was and is formidable, and you go against them at your peril.