Just read an article on Huffpo

[Hortensis]

11. Naw. Warren has no doubt had discussions with Clinton

about working together on finance reform after the election, but what on earth would be in VP for her? She's a powerful Senator now. She's supposed to give up her vote and chance for a major role in a Democrat-dominated Senate to be a tie-breaker?

As said, "No. Way."

Btw, the Boston Globe said Warren has said repeatedly that she would endorse someone during the primary. It's very late, really too late if she were going to endorse Sanders, so she may be planning on taking a stand if he tries to contest at the convention, as his campaign staff are threatening.