Biden took direct aim at Republican senators for opposing the voting protections.
"History has never been kind to those who've sided with voter suppression over voters' rights," Biden said, calling the upcoming Senate votes a "turning point" for the nation. "And it's been less kind for those who side with election subversion."
Biden, a 36-year veteran of the Senate, had previously stopped short of throwing his weight behind a change to the chamber's vaunted rules. The evenly divided Senate, which gives Democrats razor-thin control with Vice President Kamala Harris casting the tiebreaking 51st vote, is expected to consider two voting protection bills in the coming days: The Freedom to Vote Act would set some minimum federal standards on early voting and vote-by-mail options, and the John Lewis Voting Rights Advancement Act would restore the Justice Department's authority to review election law changes in states with a history of discrimination.