With three weeks to go before the Nov. 3 election, more than 2.6 million registered voters have applied for a mail-in ballot in Pennsylvania. More than 1.7 million are registered Democrats and about 641,000 are registered Republicans, a three-to-one ratio. Allegheny County has reported that more than 20 ballots with the wrong races were sent to voters. In 2016, 6.1 million voters in Pennsylvania cast ballots, with fewer than 300,000 of those cast by mail.”]