The Latest on the 2020 primary elections (all times local):

2:30 p.m.

Georgia's secretary of state has opened an investigation into voting problems in two counties in metro Atlanta amid reports of voting machine malfunctions in its twice-delayed primary election.

Republican Brad Raffensperger on Tuesday announced investigations into Fulton and Dekalb counties' election process. He called what was happening there “unacceptable” and said his office was investigating how to resolve the issues before the November general election.

It's the first time Georgia is using its new voting system, which combined touchscreens with scanned paper ballots in races for president, U.S. Senate and dozens of other contests. But Raffensperger said “every other county” was significantly better prepared.

However, voting delays weren't limited to Atlanta. In Savannah, Mayor Van Johnson said he was “inundated” with calls Tuesday morning from voters reporting “extensive delays.”

Technical problems caused at least one polling place in the Augusta area to open more than 90 minutes late, Richmond County elections supervisor Lynn Bailey told WRDW-TV. News outlets also reported problems with poll workers operating voting equipment in Macon and a long line stretching through the parking lot of polling site at a church in Columbus.