Senate Minority Leader Mitch McConnell says he’s “perplexed” why so many people in the country still aren’t vaccinated. The answer may lie, in part, within his own party. Even as Republicans move toward being more publicly trusting of the vaccine and personally reject anti-vaccine rhetoric, which McConnell did vocally early on, many in the GOP have still been reluctant to confront one of the biggest culprits of vaccine hesitancy: misinformation being spread by members of their own party.