Sanders: I'm sorry that Hillary CLinton is rerunning 2016.

[booley]

66. Gues it depends on how you look at it

Sanders did use his influence to get people in the committees to add more progressive positions to the Democratic platform.
(though as many of those progressives will tell you, it was an uphill battle)

But Clinton did at least appear to adopt some of those positions.

Even though during the primary she constantly attacked those positions as "giving everyone a pony"

That was definitely a big problem for Clinton. Many weren't sure what she really believed. Was she really as progressive as she claimed or was she just saying that for the votes Sanders drew into the Democratic orbit?
even with Sander doing over 30 events on her behalf in a matter of weeks, it's understandable there was confusion.

Though I would point out that here Sanders never said Clinton herself was a progressive.