Democratic candidate Krysten Sinema has edged ahead of Republican rival Martha McSally in Arizona, one of three states where Senate races are still undecided. The state's first major update since election night said Sinema was leading with 49.10%, or 932,870 votes, while McSally was at 48.59% with 923, 260 votes, the Arizona Republic reports. With around 500,000 votes still to be counted, the campaigns of both candidates vying to replace Republican Sen. Jeff Flake released statements expressing confidence that their candidate would prevail. The Senate race in Florida is headed for a recount and the Mississippi race will be decided in a runoff election later this month, Politico reports. (The midterm elections brought 49 out of 50 state legislatures under single-party control.)