Looks like the also-rans are trying to prop up Biden to prevent a Bernie induced wipe out of the dems in November. If Biden can get Bloomberg to drop out and fund him, he might be able to win 8 - 10 states. Probably not though. More like 4 or 5.
https://www.politico.com/news/2020/03/02/klobuchar-to-drop-out-of-2020-campaign-endorse-biden-118823