Democratic National Committee Chairman Tom Perez said Monday he would have used one of President Trump's tweets about fired FBI Director James Comey as evidence in an obstruction case.

"Last week’s tweet is an example of a piece of evidence I would’ve used in an obstruction of justice case,” Perez told Bloomberg’s Kevin Cirilli, citing his previous experience as a prosecutor at the Department of Justice.

"I prosecuted cases as the Department of Justice. I spent over a decade of my life there… I know what obstruction of justice cases are because I did them," Perez added.

On Friday, Trump tweeted that Comey "better hope that there are no 'tapes' of our conversations," just a few days after firing him.

James Comey better hope that there are no "tapes" of our conversations before he starts leaking to the press! — Donald J. Trump (@realDonaldTrump) May 12, 2017

Perez, who served as a prosecutor at the Department of Justice in the '90s, said the president’s reasoning for firing Comey does not “pass the lab test.”

While the administration first cited Comey's handling of the Hillary Clinton Hillary Diane Rodham ClintonBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Virginia Democrat blasts Trump's 'appalling' remark about COVID-19 deaths in 'blue states' The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE private email server investigation as the reason for his dismissal, Trump later said his decision was influenced by the "made up" investigation into possible ties between members of his campaign and Russia.

“He was fired because he’s the investigator in the investigation that could implicate the president of the United States," Perez said Monday. "That’s an affront to our democracy, that is an affront to our independence."

ADVERTISEMENT

He called for an independent prosecutor to investigate Russia's interference in the 2016 election, saying even a new FBI director with bipartisan support would have to report to the Department of Justice, which is in Trump’s “back pocket.”

Lawmakers on both sides of the aisle have called for independent counsel to carry on the investigation into whether Trump campaign aides colluded with Russian officials to sway the election in Trump's favor.