Rep. Kyrsten Sinema, D-Ariz., expanded her slim lead over Rep. Martha McSally, R-Ariz., Friday night to nearly 21,000 votes after more votes were tabulated in their U.S. Senate contest — one of the last remaining midterm races not yet called.

Heading into Friday night, Sinema held a 9,517-vote advantage over McSally. That lead expanded to 20,803 votes after more votes were announced out of Maricopa County, which contains Phoenix, and other surrounding counties, giving Sinema an advantage as the state continues to count votes. Sinema’s percentage lead jumped from .49 percent to 1.01 percent.