(New York Times) A former top adviser to Donald J. Trump’s presidential campaign pleaded guilty on Friday to fraud and lying to investigators in the special counsel inquiry into Russia’s interference in the 2016 election and will cooperate with the investigation.

The adviser, Rick Gates, is a longtime political consultant who once served as Mr. Trump’s deputy campaign chairman. The plea deal could be a significant development in the investigation — a sign that Mr. Gates plans to offer incriminating information against his longtime associate and the former campaign chairman, Paul Manafort, or other members of the Trump campaign in exchange for a lighter punishment. He faces up to nearly six years in prison.

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