Most problems so far have dealt with registration rules, early voting, and voter intimidation.

Currently, Virginia's attorney general is investigating alleged efforts to destroy voter registration applications statewide.

Mysterious callers in Florida and Virginia have told voters they can vote by phone, which is not true.

And fraudulent letters were sent out from Seattle to Florida voters mainly targeting Republicans, telling them they may not be eligible to vote.

"It says that there's a question on your eligibility to vote, and if you don't provide certain information and documentation within 15 days, you're going to be thrown off the rolls," voter Sharon Calvert said.

Undercover Video

In a higher profile case of voter fraud, a new undercover video captured Virginia Democratic Rep. Jim Moran's son and campaign field director, Patrick Moran, discussing how to cast a ballot for someone else.

"I would look at the law and look at what you need, but it's going to have to have a name and address on there," Patrick Moran says in the video. "It looks like you'll be able to satisfy that, but it's going to have to look legit."

The video was released by activist James O'Keefe, known for his voter fraud exposés. He set up the conversation by having a man ask about stealing votes.

Patrick Moran resigned from his job on his father's campaign Wednesday night.

"At no point did I take this person seriously. He struck me as crazy in retrospect. I should have just walked away, making it clear that there is no place in the electoral process for even the suggestion of illegal behavior," Moran said in a statement.

One voter said, "He's resigned. He's done. That's going to go with him forever."

"This is the age of fraud," another voter said. "Everything is fake nowadays, so it's really not surprising to me."

Many states have passed laws in recent years designed to reduce voter fraud by requiring voters to present identification.

Critics say the laws intimidate voters and keep them from going to the polls.