FBI Director James Comey and National Security Agency head Adm. Michael Rogers will testify publicly in the House Intelligence Committee's investigation into Russian interference in the U.S. presidential election, Chairman Devin Nunes (R-Calif.) said Wednesday.

The panel is holding its first public hearing into the matter March 20, the same day the Senate is set to begin considering the nomination of Judge Neil Gorsuch to fill the empty seat on the Supreme Court.

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Comey has been under fierce pressure from Democrats to reveal whether the bureau is investigating alleged links between President Trump’s campaign and Russian officials.

His silence on the matter has angered Democrats given the director’s public accounting last year of the FBI's investigation into Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE.

The FBI director is also facing pressure to reveal whether or not there is any truth to the president's claims that Trump Tower was "wiretapped" by President Obama in 2016.