I would not be surprised if Warren calls it quits tomorrow.
While that will mostly help Sanders, it won’t be his “Pete and Amy moment”. For starters, Warren is capturing less of the vote than Pete alone was, and far less than both Pete and Amy. Secondly, her demographic of mostly 25yo+, educated, white, suburban voters also have a lot of ties to Biden and the moderate lane, meaning he’ll snipe some of her support as well. In fact, in places like Pennsylvania and Wisconsin, Biden may end up benifitng more from Warrens departure than Sanders.