CHICAGO — Doubts surrounded Vice President Kamala Harris two months ago when Democrats, stunned by President Biden’s shaky performance during a debate against former President Trump, started to panic about November.
Harris was clearly the most logical choice to replace an aging Biden at the top of the ticket. But her run as vice president had not always been sparkling, and many Democrats privately wondered if the party would be better off with an open competition at its convention to pick a successor to Biden.