In Horry County, which includes Myrtle Beach, election workers were unable to get about 80 percent of the touch-screen machines running on time.

NPR: Several States Abandon Electronic Voting for Paper

"Any voting system is dependent on its user following the proper operating procedures and, in this case, Horry County election officials missed a step, " he says.

NPR: Several States Abandon Electronic Voting for Paper

The elections office in Horry County, S.C.

NPR: At Polls In S.C., Don't Wear Politics On Your Sleeve