Washington - Vermont Sen. Bernie Sanders is all but acknowledging that Hillary Clinton will be the Democratic nominee.

Sanders tells C-SPAN, “It doesn’t appear that I’m going be the nominee.” But he is urging Clinton to pick a running mate who he considers to be liberal. He says it would be a “terrible mistake for her to go to a candidate who has roots in Wall Street or has been backed by Wall Street.”

The senator says he expects to speak at the Democratic National Convention in Philadelphia. He says his campaign is trying to create the “most progressive platform” and change the party’s use of “superdelegates” who help determine the nominee.