The disparity in vaccination rates has so far mainly broken down along political lines. The New York Times examined survey and vaccine administration data for nearly every U.S. county and found that both willingness to receive a vaccine and actual vaccination rates to date were lower, on average, in counties where a majority of residents voted to re-elect former President Donald J. Trump in 2020. The phenomenon has left some places with a shortage of supply and others with a glut... In more than 500 counties, at least a quarter of adults might not be willing to get vaccinated, according to the estimates, and a majority of these places supported Mr. Trump in the last election. In the 10 states where the government projected that residents would be least hesitant to get a Covid-19 vaccine, voters chose Mr. Biden in the 2020 election. Mr. Trump won nine of the 10 states where the most residents said they would probably or definitely not get the vaccine. (He did not win Georgia, which is among those states.)