Trump did exactly what he needed to do. Having that stooge Wallace there as foil for Trump worked out fine. Trump succeeded from jump to control the debate. The stooge was more off balance than the half wit. Trump forced Biden to half denounce the new green deal and Bernies socialist contract. Trump might have peeled off some Bernie bros from Biden.
Possibly, but Biden and the democrat party will be counting on the hard left voting democrat because not doing so gives Trump/republicans an advantage.
When given a choice, regardless of where we stand politically, most of us will vote for who we consider the best (not perfect) candidate.