Obama's speech is an endorsement of Biden, and an appreciation of Bernie, but more than that, it is a clarion call for a return to rule of law, to fact-based leadership, and to basic goodness. Worth your time: https://www.motherjones.com/2020-elections/2020/04/obama-endorses-biden/

Obama was going to come off the bench and fight hard for any of the Democratic candidates, but there will be a real trust and network among the advisers—re both campaign and leadership—and in this crisis, that seems like an overwhelmingly good thing.