Harris and Pence square off on whether — and when — to trust a Covid-19 vaccine

Sen. Kamala Harris of California made clear Wednesday that President Trump’s word, alone, would not be enough to earn her trust in the safety and effectiveness of a future Covid-19 vaccine.

Vice President Mike Pence’s quick retort implored her to “please stop undermining confidence in a vaccine.”

Harris’ statement, which came during the only vice presidential debate of the 2020 election cycle, underscores the central role that Covid-19 vaccine development has played on the 2020 campaign trail.