Kamala Harris unbeatable for Democratic nomination if Biden drops out AxiosWhat Kamala Harris’s World Is Thinking About Biden Quitting New York MagazineReporters press White House press secretary about Biden’s candidacy and health CNNDemocrats begin to consider Harris at the top of their ticket The Washington PostWho could replace Biden if he drops out? Harris does better against Trump in polls – 6abc Philadelphia WPVI-TV