It's a tricky case...
Like you say, this a) predates the Trump admin and b) so far TDAP is still required to be in school even in Florida even after the upcoming set of dropped vaccine mandates, so even this disease isn't the result nor wouldn't be the result of even Florida's aggressively lax vaccinne policies.
On the other hand, this shows how far out of hand things can get even without the government dropping mandates and actively restricting vaccinnes and stoking more vaccine hesitancy.
You are right that it wouldn't fix things by itself, but it certainly greatly exacerbates the severity having the people in power aligned with vaccine hesitancy.