President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's former campaign manager Paul Manafort met with the Senate Intelligence Committee on Tuesday as part of the panel's investigation into Russian election meddling, The New York Times reported.

Manafort's appearance before the intelligence panel in a closed session came as the Senate Judiciary Committee issued a subpoena for the former campaign manager to testify publicly on Wednesday.

Both committees are investigating Russia's efforts to interfere in the 2016 presidential election, as well as possible collusion between the Trump campaign and Moscow.

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Manafort's Tuesday appearance reportedly focused on his presence at a June 2016 meeting with a Russian lawyer who had promised dirt on Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE. Also present at that meeting were President Trump's son-in-law Jared Kushner and the president's eldest son, Donald Trump Jr., who arranged the gathering.

Kushner spoke to the intelligence committee on Monday, where he denied any collusion or improper contact with Russian officials, according to prepared remarks.

Manafort is among the central figures in the ongoing special counsel and congressional probes into Russia's interference in the 2016 election.

He previously worked as a consultant for a pro-Russia political party in Ukraine. He disclosed to the Justice Department in June that his firm, DMP International, received more than $17 million in payments from that party for work done between 2012 and 2014.

The judiciary committee is scheduled to hold a hearing on Wednesday about the Foreign Agents Registration Act (FARA), which requires those lobbying on behalf of foreign interests to register with the Justice Department.