John Podesta, Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE’s campaign chairman whose private email was hacked during the 2016 presidential campaign, will be interviewed by the House Intelligence Committee next week, multiple sources familiar with the expected interview told CNN.

The congressional panel is investigating whether President Trump’s campaign team colluded with Russia in an attempt to interfere with the outcome of the election.

Podesta will reportedly meet with the committee in a closed-door setting, making him one of the first key witnesses before the panel.

The committee will likely ask Podesta about the hack that led to thousands of his emails leaking online, which caused the Clinton campaign embarrassment in the midst of a competitive race.

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The committee sent out requests to interview six witnesses this week, sources said.

Podesta’s classified session is expected to take place days after the leaders of the House panel meet privately with special counsel Robert Mueller.

Mueller is separately leading his own investigation into Russia’s interference in the election for the Justice Department. His meetings are likely to ensure that the other congressional probes do not interfere or conflict with his own.

Friday is also the committee's deadline for former FBI Director James Comey to turn over his files documenting his interactions with the president, including Trump's alleged request for Comey to let go of his investigation into ousted White House national security adviser Michael Flynn.

Trump has repeatedly denied that his campaign team colluded with Russia during the campaign and that he requested Comey to drop his probe into Flynn.