Sadly this is ridiculous.
First of all this model is based on the good economic numbers back in October 2019—not the economic disaster we have right now.
Secondly backfitting new models to what historical data shows is notoriously sketchy. By definition a model that is carved around past results is easy to find, but not at all proven in a predictive sense. A model only has real legitimacy if it has been used repeatedly to hypothesis results—and then repeatedly turned out to be correct.
4.5 months to election day. I think it is enough time for economic rebound. Stocks are already recovering nicely. My portfolio was worth more last Friday than the highest value before covid-19 chaos appeared.