It’s not about the dems... the targeted voters are the indies and swing voters. The dems vote early and by mail because they worship the (D) after their candidates’ names. Nothing changes with them; they’re uneducable and incorrigible.
I watched the entire debate (although I thought I might have tuned in late when Fetterman began his opening statement by saying "goodnight.") I don't see any way he could have won over undecided and independent voters who watched that train wreck.