Because mail delays were strategic against the swing states. Florida, for example, where they're allowed to count mail in votes well before election day, did no

Because mail delays were strategic against the swing states. Florida, for example, where they're allowed to count mail in votes well before election day, did not see much shift in voting ratios as time went on. Have you done any searching for evidence? It is trivially easy to find. Paper looking at partisan voting methods: https://www.pnas.org/content/117/40/24640 https://www.pnas.org/content/117/40/24640 One of the presidents attempts to discredit mail in voting: https://twitter.com/realdonaldtrump/status/1288818160389558273?lang=en https://twitter.com/realdonaldtrump/status/12888181603895582... And of bigger importance, the election that just occurred, where mail in ballots were heavily partisan.