Because of COVID-19 concerns, officials opted for the first all-mail election in state history. Unlike other counties, Clark County mailed ballots to all — not just active — voters, in part because of legal pressure from state and national Democrats.

Of the 1,325,934 ballots mailed out in Clark, 223,469 were returned as undeliverable. About 305,000 were returned by voters, verified and counted by the county.

About 58 percent of the undeliverable ballots belonged to inactive voters — those who have failed to confirm their address with the county but remain registered. Inactive voters are removed from the rolls entirely if they miss two consecutive federal elections.