Warren Won't Endorse Sanders

http://blogs.wgbh.org/masspoliticsprofs/2016/2/22/warren-wont-endorse-sanders/

"...The truth is that Warren will not endorse until the nomination is a fait accompli. She will not put her foot on the scale to help the now faltering protest candidacy of Bernie Sanders primarily because she believes in the Democratic Party. She believes that a strong united Democratic Party is the key to electoral victory and policy accomplishment.

snip

There’s no denying the ideological fit between Warren and Sanders, but there is also a significant difference between the two. Warren understands better than Sanders the limited utility of protest politics. She also understands that if Sanders truly is capable of winning in the fall, he would also be capable of winning the nomination without her foot on the scale.

snip

The perception, repeated by Eric Fehrnstrom in the Globe recently, that Warren owes her own 2012 election to ultra-progressive voters and her “anti-Wall Street crusade” is flatly wrong. Warren was a good candidate who definitely put her progressive message front and center, but she beat Scott Brown because she is a Democrat, not because she is a progressive. Warren understands that the realization of her agenda requires a healthy, powerful Democratic Party. She may sympathize with Bernie’s ideology and values, but she does not sympathize with Bernie’s contempt for the Democratic Party establishment. "

An interesting take and it feels on point to me, we'll see if this comes to pass.