Ohio, a battleground state in the presidential race, removed the names of tens of thousands of registered voters under what it calls its “supplemental process."

Under this controversial method, voters were taken off the registration rolls after six years of not voting, regardless of whether they remained eligible to vote.

As ABC News reported in June, many of those removed were from low-income neighborhoods or neighborhoods that tended to vote Democrat.

Voting-rights activists argued that this method of removing voters directly violates the National Voter Registration Act, which says states can only remove voters from the rolls if they request it, die or move.