Giuliani at Center of Georgia’s Trump Investigation

Representative Bee Nguyen, another Democrat who testified before the grand jury, attended a second hearing a week later, held by the state’s House of Representatives, at which Mr. Giuliani appeared remotely.

“It was very surreal for me to revisit everything that occurred leading up to the Dec. 10 hearing, and everything that occurred in the aftermath,” she said, adding that, in retrospect, the performance of Mr. Giuliani and his team felt like it was part of “a very coordinated effort that led up to what happened on Jan. 6.”

Mr. Giuliani’s lawyer did not respond to requests for comment. In recent weeks, the former New York City mayor has been most visible on the campaign trail in New York, where his son, Andrew Giuliani, is running for governor. While campaigning for his son over the weekend, Mr. Giuliani claimed he was the victim of a vicious attack by a grocery worker, but charges were limited to misdemeanors after video footage appeared to show the man touching, rather than hitting, Mr. Giuliani on his back while walking past him. (Eric Adams, the mayor of New York City, said Tuesday that it is Mr. Giuliani who should be investigated in the incident, for falsely reporting a crime.)

Since the Georgia hearings were filmed, there is considerable evidence for prosecutors to work with. “There was a seven-hour video,” Senator Jennifer Jordan, another Democrat who appeared before the grand jury, said of the Senate hearing, adding, “I’m pretty sure that grand jury has viewed the whole thing in its entirety.”

Mr. Giuliani and Mr. Trump are not the only people whose conduct is being scrutinized by the grand jury; others include Mark Meadows, who as White House chief of staff traveled to Georgia in December 2020 amid an audit of absentee ballots; and Senator Lindsey Graham of South Carolina, who called the Georgia secretary of state, Brad Raffensperger, to inquire about the rules for discarding mail-in ballots.

Among the charges being weighed by Ms. Willis are racketeering and conspiracy, as well as one related to making false statements “in matters within jurisdiction of state or political subdivisions,” which would include legislative committees. The special grand jury was impaneled in early May and has up to one year to complete its work before issuing a report advising Ms. Willis on whether to pursue criminal charges. “In a perfect world, I’d be done in the next 60 to 90 days,” Ms. Willis said in an interview last month. “But I live in an imperfect world.”