From the Arizona Republic:
Election Day may be over, but there still are hundreds of thousands of ballots left to count.
In Maricopa County, there are at least 218,862 ballots that have not been tabulated, said Yvonne Reed, spokeswoman for the county's elections department. This number includes early ballots that were dropped off at the polls and provisional ballots.
Most of the statewide races would require a very strange turn of events to be affected by these ballots, however, Prop. 203, currently losing by 6,519, would seem the most likely to tip.