Brian Kemp’s Office, Without Citing Evidence, Investigates Georgia Democrats Over ‘Hack’

In a CNN interview, Ms. Abrams added, “He is desperate to turn the conversation away from his failures, from his refusal to honor his commitments, and from the fact that he’s part of a nationwide system of voter suppression that will not work in this election.”

Mr. Kemp’s office said the F.B.I. was notified about the inquiry into the alleged hack.

Kevin Rowson, a spokesman in the F.B.I.’s Atlanta field office, said the bureau had no comment. When the F.B.I. receives referrals, agents then decide whether to proceed with an investigation. The bureau does not comment on the existence of investigations, and it has traditionally avoided taking public actions that would affect elections.

Candice Broce, a spokeswoman for Mr. Kemp, said in the statement: “While we cannot comment on the specifics of an ongoing investigation, I can confirm that the Democratic Party of Georgia is under investigation for possible cyber crimes. We can also confirm that no personal data was breached and our system remains secure.”

It was unclear how Mr. Kemp’s office had identified Democrats as being behind the alleged hack.

In December 2016, Mr. Kemp accused the Department of Homeland Security of hacking into Georgia’s voter registration records, as well the Georgia secretary of state’s computer systems. An independent investigation by the department’s inspector general, which operates independently from the department’s chain of command, found that the activity Mr. Kemp believed was suspicious was, in fact, normal behavior between computer systems.

“We have recently completed our investigation into these allegations and have determined that the activity Georgia noted on its computer networks was the result of normal and automatic computer message exchanges generated by the Microsoft applications involved,” John Roth, the inspector general, wrote in a letter to the House Oversight Committee.

Voter registration records, which are kept on a state-by-state basis, are an alluring target for hackers. The records provide details on voters, yet are often kept in insecure databases or computers with outdated systems. During the 2016 presidential elections, Russian state actors probed the voting registration records of 21 states, according to the Department of Homeland Security.