CNN  —  Pre-election voting is winding down across the country , with many states wrapping up in-person early voting over the weekend. More than 78 million ballots have already been cast in 47 states and the District of Columbia, according to data gathered by CNN, Edison Research and Catalist, a company that provides data, analytics and other services to Democrats, academics and nonprofit advocacy groups, including insights into who is voting before November. The data offers a sense of who is