A new study highlights how closely connected politics and health outcomes have grown over time. Investigators from Brigham and Women’s Hospital examined mortality rates and federal and state election data for all counties in the U.S. from 2001 to 2019. The team found what they call a “mortality gap”—a widening difference between age-adjusted death rates in counties that had voted for a Democrat or a Republican in previous presidential and governor elections. The team found that mortality rates decreased by 22 percent in Democratic counties but by only 11 percent in Republican counties. The mortality gap rose across top disease areas, including heart disease and cancer, and the mortality gap between white residents in Democratic versus Republican counties increased nearly fourfold during the study period. Results are published in the British Medical Journal.