San Diego County Supervisor Bill Horn (search) is trying to change California law so that voters need to prove their citizenship when voting. He calls it a no-brainer. Others call it discrimination.

"It is specifically, I believe, targeting immigrants who have become citizens of the United States," said Jess Durfee, chairman of the San Diego Democratic Party (search).

He said it is a tactic to help keep Republicans in office.

"We know that their strategy nationwide is to suppress the turnout because the more they can suppress the turnout the better it works for them," Durfee said.

But Horn said the issue is fraud.

"In L.A. you had 16,000 voter cards that were found with names on it of people who didn't exist in the phone book."

To register to vote in California you need only a driver's license and the last four digits of your Social Security number. To actually vote, you need only a name and an address. Seventeen other states require identification to vote, and Arizona has a measure on the November ballot that would require proof of citizenship.

However, changing the voting law in California is an uphill battle. In the last legislative session, a measure requiring voters to have identification never got out of committee.

Click on the video box at the top of this story to watch a report by FOX News' Trace Gallagher.