Voters wait amid delays at Annistown Elementary in Gwinnett County, Georgia. Ontaria Woods

James Herndon in Decatur, Georgia, tells CNN: "Lines are long. So that’s great! But, they are extremely delayed. Up front they are having trouble verifying lots of people. People who live here and vote here whenever possible."

Herndon said his wife "put the card in the machine and it shot it out and said 'error' when she turned it in and asked what was up."

A polling worker there told her that it showed she had “already voted" and said “that has been happening this morning” -- but didn’t explain why that machine was still being used or why her card went back in the stack to be used again.

They gave her a provisional ballot and told her it would be counted, asking her to write what happened on the back.

Elsewhere, Ontaria Woods of Gwinnett County tells CNN she has been waiting in line to vote at Annistown Elementary since 7 a.m.

She told CNN:

"So ballot machines are down. They are unable to print our ballots on the card. They’ve brought in new machines and now they’re about to try to bring in new cards. I’ve been here since 7AM."

She posted on Twitter videos and pictures of long lines of people waiting to cast their ballots. "People who are here to vote have gone to Walmart using their money to provide water, juice and crackers," she added.

"Voters are highly upset and they feel like this has not been handled properly. We’ve been offered paper and provisional ballots and nobody feels safe using them. Most people refuse to leave and are determined to vote."