We all know Biden looked bad to a certain degree that night but I still think the Dems have exaggerated a bit too much with the fear angle. Putting Newsom, Whitmer, or whoever this late is a bad idea and a gamble that could come back to haunt them in November. I hate this narrative that's been put out making it seem like any ole Dem with a mouthpiece could beat Trump with ease or that voter turnout would be unanimously equivalent or greater than Biden's 2020 turnout.
That's a terrible strategy because we simply don't know that to be true, what we do know to be true is that Biden had a high turnout and beat Trump in 2020 even after a lackluster debate that election season. The Dems shot themselves in the foot, not because they've been sticking with Biden up to this point but due to them invoking fear, panic, and uncertainty amongst voters at the wrong time which can lead to unmotivated apathetic voters believing the party is in turmoil.
If they did all this early in the year back in January, February, or even March it'd been different. Hell, even late last year would've been different, if I were the Dems I'd take my chances with Biden at this point because for the most part voters are familiar with him and his policies, etc. Give Newsom, Whitmer, Kamala, etc time to become more familiar amongst voters in terms of polices and agendas so that by 2028 more people would have a clearer sense of these potential candidates and their goals causing this assumption that people by default will vote for any Dem just because it's Trump on the other side is a foolish gamble.