Some Philly neighborhoods haven’t gotten mail delivered in three weeks, leaving some residents scrambling for their medications and paychecks. Democratic lawmakers are now raising the alarm that the U.S. Postal Service won’t be able to handle a surge of mail-in ballots for November’s presidential election. Philadelphia Inquirer reporters Ellie Rushing and Jonathan Lai explain the reasons behind the mail delays and why lawmakers are right to be concerned about the potential impact on the election.