Biden improved his margin of victory compared to Hillary in 31 out of 36 urban counties — and Philadelphia was one of the five in which he didn’t. In 29 of the cities, the Democratic margin of victory grew on a percentage basis. Of the twelve cities in which Biden overperformed Hillary by enough that his margin of victory grew by 10 percent or more (as a percentage of the 2016 electorate), only one (Atlanta) was in a swing state, and one other (Omaha) in a swing district. Biden’s improvements in Milwaukee and Detroit were distinctly subpar, and in Detroit, Trump improved his own share of the vote enough to be the first Republican to break 30 percent of the vote in Wayne County, Mich., in 32 years.
Yes, Biden had some really striking “metro area” improvements over Hillary in key states, but other than Atlanta, many of those came either in the surrounding suburbs (the election was really won in the suburbs, most of all around Philadelphia) or in counties such as Maricopa County, Ariz., (which contains both Phoenix and Mesa and was won by Trump four years ago) and Douglas County, Neb.,(which contains Omaha and swung one electoral vote). But those are not counties run by infamously corrupt Democratic local parties, and “voter fraud in the suburbs” is neither as sexy nor as plausible as fraud by the kinds of urban machines that gave us 100,000 fraudulent votes in Chicago in the 1982 Illinois governor’s race. Biden turned out tons of additional votes in Austin, Denver, San Antonio, Albuquerque, Portland, and Nashville, too, but none of those mattered to the outcome.