Sen. Richard Blumenthal (D-Conn.) on Monday said he believes there “has to be” a face-to-face interview between President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE and 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 as the latter continues his investigation into possible collusion between the Trump campaign and Russia.

“Unquestionably there has to be that kind of face-to-face interview. The timing is important because the special counsel needs to have as many facts and as much evidence before he has that face-to-face interview with the president of the United States,” Blumenthal said on CNN’s “New Day.”

NBC News reported Monday that Trump’s legal team is discussing options for a potential interview between the president and the special counsel.

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Blumenthal, who is a member of the Senate Judiciary Committee, said he expects there will be more indictments and convictions in Mueller’s investigation into Russian meddling in the 2016 presidential election.

“I think that the evidence accumulating against individuals within the White House, within the administration, the mounting evidence of obstruction of justice that’s public, and we have no idea all of what is available to the special counsel,” Blumenthal said when asked why he believes there will be more indictments.

The Senate Judiciary Committee is one of multiple congressional committees conducting separate ongoing investigations into Russian election meddling.

Mueller’s investigation has thus far led to two indictments and two guilty pleas.

Former Trump campaign chairman Paul Manafort Paul John ManafortBannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention Ukraine language in GOP platform underscores Trump tensions MORE and his former associate, Richard Gates, were indicted last year on money laundering and tax fraud charges, among others.

Former White House national security adviser Michael Flynn and former campaign policy adviser George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE both pleaded guilty to lying to the FBI.

Trump has repeatedly downplayed Mueller’s investigation, calling it a “witch hunt” and claiming there is no evidence of collusion.

Several Republican lawmakers have in recent weeks questioned the integrity of Mueller’s investigation, pointing to anti-Trump text messages sent by a former member of Mueller’s team.