The Biden campaign ought to do an ad buy, a different ad each day from now until the election, calling attention to something stupid or outrageous that Trumpie said, or a lie that he told, on the exact same date in 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, or 2023. There will not be a paucity to choose from but a superabundance.