Biden vs. Trump Rematch Bracket

What single factor will have the biggest effect in an election where both candidates have already been president and have essentially 100% name ID? Bradley makes a list of the top 16 factors, sets them off against each other in a tournament bracket and picks the winners with pollster extraordinaire Jefrey Pollock of Global Strategy Group. And the champion is ... sorry, we're not giving it away. You'll just have to listen.