In the aftermath of President Joe Biden’s poor performance on Thursday night when he debated Donald Trump, one Washington Post contributing columnist suggested that, if Biden stepped aside as multiple commentators are urging him to do, it could cause problems for the convicted felon ex-president. According to longtime political observer Matt Bai, a wide-open Democratic convention scheduled to begin August 19th in Chicago would become must-see TV for Americans who would then be unsure who the Democratic nominee would be — thereby engaging potential voters who planned to sit this election out ov…