It was not a seemingly short onset of symptoms it was actually 6 days Saturday - Thursday!!
Yep, average onset of symptoms is 5.1 days after exposure for COVID-19...the Rose Garden Barrett nomination event is a much more likely culprit than the debate...incubation period wise.
https://pubmed.ncbi.nlm.nih.gov/32150748/
https://www.aarp.org/health/conditions-treatments/info-2020/onset-of-covid-19-symptoms.html