Stacey Abrams addressed a panel discussion Tuesday in one in a series of Democrat-hosted events ahead of the debate.
She said voter suppression can involve whether people can register and remain on the voter rolls, and whether their ballots can be counted.
Abrams also spoke out against what she called restrictive voter ID laws that can exclude many disabled people. She said that hers was "one of the only campaigns that had disability advocates at the tables from the very beginning."
Democrats have suggested that Abrams lost the close 2018 gubernatorial election because of voter suppression, despite record turnout. Republican officials have denied suppressing votes.
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