A list of 100-thousand voter names has sparked controversy in Florida.
The Department of Justice is threatening a lawsuit if the state eliminates those voters from the rolls.
The so-called "voter purge program" used DMV records to flag names of potentially non-eligible voters.
Critics say the list targets minorities, who tend to vote for Democrats.
Florida's Republican governor is defending the purge. He says anyone with a legitimate right to vote will have plenty of opportunities to set the record straight.
"If there's credible evidence that somebody is registered to vote that's not, they get sent a letter. They get 30 days to respond. If they don't respond, there's a notice filed in the paper. If they don't respond, then they are taken off the rolls.But if they show up to vote, they get to vote provisionally. And then we make sure. We don't want anybody -- we want all U.S. citizens to vote. It's we don't want non-U.S. citizens to vote."
Florida is a crucial state in November's presidential election. It holds 29 of the 538 available electoral votes -- or more than 10-percent of the 270 needed to win the presidency.
And of the four largest states -- including California, Texas, and New York -- it's the only one expected to host a tight race between President Obama and presumed Republican nominee Mitt Romney.