A key state for which we are waiting on more returns is Arizona, which has reported three-fourths of its expected vote. At the moment, Biden leads by about 9 points, but the Election Day vote will make it closer, one way or another. The key to Arizona is Maricopa County, which made up 60 percent of the vote in 2016 and is one of the largest by population in the country. Home to Phoenix, the county currently gives Biden a 9-point lead based on 77 percent of the expected vote, about matching the state.