(crowd cheering) thank you for organizing. black lives matter! man: black lives matter! woman: black lives! crowd: matter! woman: thank you so much. ♪ reporter: not only may this actually be the most important election in our lifetime, it certainly will be the most unusual. ♪ reporter: states across the country are turning to mail-in voting in this election in an effort to allow americans to vote safely during the pandemic. holt: while most americans support the option of mail-in balloting, president trump launched a new attack on it today as he trails joe biden in the polls. president trump: they're gonna be sending out 80 million ballots. where are they going? who are they sending them to? they're trying to rig this election. reporter: the president's failure to address the pandemic continues to hurt him in poll after poll. asked if he would accept the election results, the president said, "i'll have to see." president trump: the only way we're gonna lose this election