Thread title is inaccurate because Trump's support for himself technically counts, but also...this doesn't really mean anything? Two Democratic ex-Presidents support Biden including the one he was VP under. That's like saying "Minnesota Governor's supports Amy Klobuchar for re-election" when Walz inevitably endorses her over her Republican opponent.
Trump supporting himself is factual, but does it really count for anything meaningful? Not really. After all the talk about the Democratic Party being so divided and gossip replacing Biden on the ticket this show of unity pretty much shuts all that down. If Biden were that hated neither Clinton or Obama would be appearing on stage with him. Remember, Biden is supposedly the most hated President ever according to Atlas.
But if it makes you feel better I'll edit the thread title. I don't want you upsetting yourself because that isn't healthy. You clearly were triggered by this and I apologize.