MSM is not reporting any such negativity from Obama on Biden.
What is becoming apparent is Obama's role now in speaking out against Trump -- he has become very vocal over the past week. Obama knows full well that Biden isn't all that and his intention is to run Joe's campaign from behind. I think that we're going to see the DEM party soon call for Joe to step down and let Harris take the reigns -- who she picks as her VP is going to possibly be more important than her own campaign. Michelle? Hillary? Valerie? Rice?