Rep. Eric Swalwell, D-Calif., questioned former Trump campaign manager Corey Lewandowski during his Sept. 17 testimony before the House Judiciary Committee. Lewandowski was one of the people featured in special counsel Robert Mueller's probe of Russian meddling during the 2016 election, including in Mueller's investigation of possible obstruction of justice by President Donald Trump. Mueller chose not to offer a conclusion on the question of obstruction. Democratic lawmakers have led congressional efforts to investigate the matter further.

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