Sen. Richard Blumenthal (D-Conn.) says the Trump administration’s firing of FBI Deputy Director Andrew McCabe Andrew George McCabeGraham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' GOP votes to authorize subpoenas, depositions in Obama-era probe MORE is “added evidence of obstruction of justice” 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 probe into ties between the Trump campaign and Russia.

“McCabe firing is an undisguised attack on Special Counsel investigation - attempting to undermine him as a witness,” Blumenthal said on Twitter.

McCabe firing is an undisguised attack on Special Counsel investigation - attempting to undermine him as a witness. Added evidence of obstruction of justice. https://t.co/3cvhLlTJom — Richard Blumenthal (@SenBlumenthal) March 17, 2018

The Senate Judiciary Committee member argued that McCabe’s firing shows that Congress needs to pass a bill protecting Mueller’s investigation and blocking the removal of the special counsel.

ADVERTISEMENT

“Firing McCabe - a possible witness to obstruction - exemplifies Pres. Trump’s total contempt for the rule of law,” Blumenthal said. “He will stop at nothing to undermine the Mueller investigation.”

Firing McCabe - a possible witness to obstruction - exemplifies Pres. Trump’s total contempt for the rule of law. He will stop at nothing to undermine the Mueller investigation. — Richard Blumenthal (@SenBlumenthal) March 17, 2018

Firing McCabe threatens professional law enforcement with blatant political interference - a disservice to dedicated men and women of FBI and other agencies. — Richard Blumenthal (@SenBlumenthal) March 17, 2018

Blumenthal has often called for Congress to pass a bill to protect Mueller, including after a New York Times report that President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE ordered that Mueller be fired last year.

Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE fired McCabe on Friday night, saying McCabe hadn’t been completely honest with investigators and had made an unauthorized disclosure to the press.

McCabe says he was fired to try and undermine Mueller’s probe, in which he could be a key witness. McCabe led the FBI in the weeks after Trump fired former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE, an area of interest in Mueller's probe.

The former FBI official also says that he had the authority at the time to share information with the media.