Mueller's investigation into Trump started one year ago — here's how long special prosecutor investigations usually last
Business Insider -

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The special counsel Robert Mueller was appointed one year ago today to investigate Russian meddling in the US election and possible ties to President Donald Trump's campaign.

Trump and his allies have recently stepped up the pressure on Mueller to wrap up the investigation.

Special prosecutor investigations take an average of 904 days, much longer than Mueller's investigation.

One year ago today, former FBI director Robert Mueller was appointed as the special counsel...

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