Former FBI Director Robert Mueller, special counsel on the Russian investigation, leaves following a meeting with members of the US Senate Judiciary Committee at the US Capitol in Washington, DC on June 21, 2017.
Former FBI Director Robert Mueller, special counsel on the Russian investigation, leaves following a meeting with members of the US Senate Judiciary Committee at the US Capitol in Washington, DC on June 21, 2017.

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    Documents show Mueller quickly expanded probe

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Documents show Mueller quickly expanded probe

Last June, special counsel Robert Mueller asked a government agency to preserve documents relating to Donald Trump's transition to the presidency, showing how quickly he expanded the Russia investigation. CNN's Kara Scannell reports.

Documents show Mueller quickly expanded probe

Last June, special counsel Robert Mueller asked a government agency to preserve documents relating to Donald Trump's transition to the presidency, showing how quickly he expanded the Russia investigation. CNN's Kara Scannell reports.