Sen. Lindsey Graham (R-S.C.) on Tuesday said he was briefed about Georgia’s mail-in ballot signature verification, saying officials have the ability to conduct a signature audit, as was requested by President Donald Trump and other prominent Republicans. “I have just been briefed about the signature verification system in Georgia regarding 2020 mail-in ballots. From what I’ve been told, sounds like they now have a credible process in place to do a signature audit,” he wrote, without elaborating. “Look forward to hearing the results!” It’s not clear if Graham, the head of the Senate Judiciary Committee, was referring to a signature audit of the ballots cast during the Nov. 3 presidential election—or an audit for future elections, including the Senate runoff election in Georgia. It’s also unclear about what agency or officials had briefed Graham. Over the past month or so, President Donald Trump has pushed Georgia Gov. Brian Kemp and …