A growing number of Americans are ditching Democratic-run cities for Republican suburbs in search of lower taxes and more affordable real estate prices. In Republican counties, defined by the 2020 presidential vote, about 3.7 million more people have moved in than left over the past four years, according to a Stateline analysis of U.S. Census Bureau estimates and county presidential election data by the University of Michigan. By comparison, Democratic counties saw a net loss of 3.7 million residents during that same time period. Republican suburban counties in four swing states — Georgia, Michigan, Pennsylvania and Wisconsin — gained the most new arrivals, while heavily Democratic cities lost the most.