RADFORD, Va. (AP) — Republican vice presidential nominee JD Vance has used his first solo campaign appearances to throw fresh barbs at Vice President Kamala Harris. His rallies in Ohio and Virginia on Monday came a day after President Joe Biden threw the presidential election into upheaval by dropping out and endorsing his second-in-command to lead Democrats against Donald Trump. The venues were intended to play up Vance’s populist appeal across the Rust Belt and small-town America. Vance said that “history will remember Joe Biden as not just a quitter, which he is, but as one of the worst presidents in the history of the United States of America.” But he added that “Kamala Harris is a million times worse and everybody knows it.”