Dem voters in Philly are largely voting by mail. Mail ballot mistakes can cost election if results are close.

It took over a week for Philly to count mail-in ballots. PA law doesn't allow mail ballots to be counted til day of election. So, if anything, I'm anticipating chaos. https://t.co/XWQFSlBeUu

— Lauren Werner (@LaurenWern) October 20, 2020