Kamala Harris unbeatable for Democratic nomination if Biden drops out AxiosWhat Kamala Harris’s World Is Thinking About Biden Quitting New York MagazineDemocrats begin to consider Harris at the top of their ticket The Washington PostHere Comes the ‘KHive’: Buzz for Kamala Harris Grows After Biden’s Debate Stumble The New York TimesWho could replace Biden if he drops out? Harris does better against Trump in polls – 6abc Philadelphia WPVI-TV