Voting Machines For Major Counties Decertified

Colorado's top election official decertified electronic voting machines used in some of the state's largest counties on Monday, including Denver, Arapahoe and Jefferson.

Coffman said the system had a 1 percent error rate when counting ballots. "So for every 100 ballots we tested, we found there was an error with one of those ballots," Coffman said.

He said at the time that the four electronic voting systems used in all 64 Colorado counties would have to apply for recertification. The four systems are manufactured by Hart InterCivic, Premier Election Solutions -- formerly known as Diebold Election Systems -- Sequoia Voting Systems and Election Systems and Software.