Sen. Lindsey Graham has announced that he will grant Democrats’ request to have former special counsel Robert Mueller testify before the Senate Judiciary Committee about his investigation into Russian interference in the 2016 presidential election. The surprising statement from one of the Senate’s leaders comes a day after Mueller broke a longstanding silence to defend his probe, and its consequential conviction of Roger Stone, in a public op-ed. Graham, a South Carolina Republican and the Judiciary Committee’s chair, has attempted to discredit Mueller’s inquiry in the past.