US special counsel Robert Mueller testifies before the US Senate Judiciary Committee on Oversight June 19, 2013, in Washington. He was the director of the FBI at the time. Photo: AFP

Robert Mueller subpoenas social media expert who made ‘Twitter swarms’ to help Donald Trump win election

Jason Sullivan worked for Trump’s political adviser, Roger Stone; his subpoena suggests Mueller may be closing in on Stone amid claims that he had advance knowledge of material allegedly hacked by Russia and given to WikiLeaks

Topic |   Trump-Russia collusion investigations

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US special counsel Robert Mueller testifies before the US Senate Judiciary Committee on Oversight June 19, 2013, in Washington. He was the director of the FBI at the time. Photo: AFP
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