Most voters cast ballots by mail in Arizona, and by Friday there were still more than 700,000 ballots remaining to be counted, according to the secretary of state’s office. In the Senate race, the Democrat, Ruben Gallego, was ahead of the Republican, Kari Lake, by nearly 41,000 votes in the tally so far.

The nation’s largest state by population has one of the longest vote-counting processes, both because of the sheer number of ballots and efforts to make voting easier.

Democratic and Republican activists are asking voters to correct technical errors on their ballots in several close races that could determine control of the House.

These differences in how states count — and how long it takes — exist because the Constitution sets out broad principles for electing a national government, but leaves the det

Several of the yet-to-be-decided House races are in California, which had only counted about three-quarters of its votes statewide as of Tuesday.