Well yeah. At the dem debates, the Bern has proved to be underwhelming, almost a lap dog for the Hillster. He had plenty of opportunities to hit her on Benghazi or the emails, but completely dismissed it and kissed her arse.
The price Bernie Sanders has to pay if he defeats Clinton to win the nomination would be to choose the most eligible female as VP. That would be Elizabeth Warren. Clinton is trying to corner the women vote by talking about history.