Did the democrats just win the election?

As you no doubt know (if you pay attention to U. S. politics) Joe Biden is no longer the democrat's nominee. Most likely it will be Kamala Harris. The entire message of the GOP was that Trump is in better physical shape and stronger than Biden. That the Trump-Vance ticket is presenting a new and younger leadership. With Harris as the new opponent of Trump, his entire campaign has to be reworked. Was this possibly the best case scenario for the democrats to have their presumptive nominee to drop out right after the GOP convention where the GOP has uninterrupted airtime?

Did the democrats just win the election?
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