Notable that this story is at Fox News:

More than two million Ohio residents requested mail-in ballot applications prior to the start of early voting on Tuesday, doubling the count at the same time in 2016 and 2012. Ballots in the state are counted for up to 10 days after Election Day — as long as they are postmarked by Nov. 2 — meaning that election results displayed on the night of Nov. 3 will be unofficial and include all votes received through any method by 7:30 p.m. local time.

LaRose, a Republican, said the state will have “pretty conclusive” results on election night if early returns show President Trump or Democratic nominee Joe Biden winning the state by a wide margin.

But if the race is close, he acknowledged that it could take “three weeks or more” to know the final results as elections officials work to tabulate mail-in and provisional ballots. LaRose added that the state is taking steps to be transparent about the process, such as publishing the number of outstanding mail-in ballots online.

“When the results on election night say one thing and then when the results change over the ensuing several weeks, that’s not a sign that something nefarious is happening. In fact, quite the contrary,” LaRose told Fox News. “It’s a sign that the legal process is being allowed to play itself out so that every legally cast vote can be tabulated. That’s exactly what we need to do.”…

Trump has argued, without evidence, that mail-in ballots are susceptible to fraud and suggested that their widespread use could result in a “rigged election.” During his debate with Biden last week, Trump said he would only accept the results of the vote “if it’s a fair election.”