Vice President Kamala Harris may be leading former President Donald Trump in national polls, but political strategists point out that she is still underperforming compared to previous Democratic candidates in 2020 and 2016 at this point in the race. Harris is currently outpacing former President Donald Trump across several national polls, boasting a 2.8 point lead according to FiveThirtyEight and a 1.4 point lead according to RealClearPolling. Harris is underperforming, however, in national polls and across key demographics compared to President Joe Biden and former Democratic nominee Hillary …