House Judiciary Committee chair Jerry Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.) said Sunday that Democrats would call former White House counsel Don McGahn to testify about his testimony for special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation.

Nadler made the announcement on NBC's "Meet The Press" while saying that Congress needed to hear from people such as Mueller and Attorney General William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE.

"We have to hear from other people like Don McGahn, who we’re going to call," Nadler added.

ADVERTISEMENT

The Democratic lawmaker, a frequent critic of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's, argued on Sunday that Barr had "clearly misled the American people" on Mueller's investigation into obstruction of justice.

Among other things, Nadler said that Trump's possible obstruction, "if proven, would be impeachable."

The comments come just days after the Justice Department released a redacted version of Mueller's report into Russian interference and Trump. The report stated that the special counsel was unable to “conclusively determine” that no criminal conduct occurred in regards to obstruction of justice.

It also included several instances of possible obstruction of justice, including Trump's alleged request of McGahn to fire Mueller. McGahn refused to follow through on the request, according to Mueller's report, saying "that he would resign rather than trigger what he regarded as a potential Saturday Night Massacre."

Trump's attorney, Rudy Giuliani, said Sunday that Trump would not have committed obstruction of justice if he fired Mueller because "there were very good reasons to fire" him.

“Mueller hired a staff in which he had people that I would find very, very questionable as people that should be investigating Donald Trump," Giuliani said.