AUSTIN, Texas - Over 2,000 registered voters have been flagged as potential non-citizens by the Texas Secretary of State's Office.

There were more than 200 flagged voters in Bexar County, and 97 in Travis County. The most significant number came from Harris County, with 362.

Voter rolls investigation

What they're saying:

"Anyone who is not a U.S. citizen, but is registered to vote did so illegally, perhaps by error, but illegal nonetheless," said Mark Jones, a political science professor at Rice University.

On Capitol Hill, several lawmakers, including U.S. Senators John Cornyn and Ted Cruz, filed a joint petition with the U.S. Election Assistance Commission to require voters to show proof of citizenship when registering to vote.

"Since we don't have a national citizenship ID or ca

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