If Ron DeSantis is going to defeat Donald Trump for the GOP nomination, he will have to identify things President Trump did poorly and explain what should have been done. Trump's most serious failing was not understanding that Democrats were rigging the 2020 election process and moving heaven and earth to counter-rig it.
Trump's second most serious failing was his inability to coerce the federal bureaucracy - civilian and military - to do what he asked of them. Both of these failures are "inside baseball" issues, difficult to explain to voters.
What DeSantis can explain to voters is Trump's putting Dr. Anthony Fauci in charge of our national response to the Covid-19 epidemic. We all saw Trump on TV with Fauci and Birx night after night, it is hard for him to deny or obfuscate their role.
Fauci pushed the nationwide lock-down when most of those who were made seriously ill or died from the disease were old and already suffering from one or more substantial health issues. And both Trump and Fauci exaggerated the benefits of the experimental mRNA vaccines.
The economic and educational deficits caused by the lock-downs were big and long-lasting. Trump didn't foresee those impacts, or minimized them. Don't be surprised if DeSantis uses these lapses against Trump.
