NBC's Chuck Todd reconfirmed his role in the 'resistance' this weekend as he clashed with Senator David Perdue (R- G.A.) on Sunday over the upcoming impeachment trial and whether Lev Parnas should testify.

Perdue told Todd on NBC's "Meet the Press" that Parnas, a colleague of President Trump's attorney, Rudy Giuliani, shouldn't testify because his testimony would be considered "second-hand information."

"This is a distraction," Perdue said. "This a person that's been indicted. Right now, he's out on bail. He's been meeting with the House Intel Committee. If the House felt like this information was pertinent, I would think they would have included him."

Todd fired back and said:

"How is it second hand? He was in Ukraine. He was doing the bidding," adding that Parnas has key "material evidence that might help connect some dots."

Perdue responded by saying Parnas is trying "to get his sentence reduced."

WATCH: @ChuckTodd asks @SenDavidPerdue why the Senate shouldn’t hear from Lev Parnas “under oath?” #MTP #IfItSunday



Perdue: “Again, second hand information. This is a distraction.”



Chuck Todd: “How is it second hand? He was in Ukraine. He was doing the bidding.” pic.twitter.com/qir3A1gRnK — Meet the Press (@MeetThePress) January 19, 2020

Perdue defended Trump's actions in Ukraine by indicating the administration was concerned about corruption involving an American citizen. He also rejected a suggestion by Todd that Trump was close to Parnas.

Parnas made the rounds on the mainstream media last week, stopping by none other than the Rachel Maddow Show Wednesday night to claim that he was sent to Ukraine at the order of Rudy Guiliani and Trump to uncover dirt on Joe Biden's son, Hunter Biden.

The schizophrenia is astonishing.

In October of 2019, European businessman, Lev Parnas, who claimed to have “explosive information about corruption involving Hillary Clinton and Joe Biden”, was arrested at Dulles airport on “campaign finance violations.”

And, now, just three months later, Parnas is dropping impeachment bombshells on Trump.

The interview came the same day the impeachment articles were delivered to the Senate.

Separately on Sunday, Nadler spoke with Brennan on CBS's "Face the Nation" that "in any trial, all relevant witnesses must be heard," except, Nadler added, for Hunter Biden, who should not be a witness in the impeachment trial because he does not know the allegations against the president.

.@RepJerryNadler suggests Hunter Biden should not be a witness in the Senate impeachment trial, adds that Chief Justice John Roberts should make a determination. “I’m saying that Hunter Biden has no knowledge of the accusations against the president." pic.twitter.com/Uh7w5KJAtQ — Face The Nation (@FaceTheNation) January 19, 2020

So - to clarify the left's position on witnesses:

Parnas - who is at best a secondary witness and worst desperate for a deal to avoid prison - should be a witness "as he can connect the dots;"

but Hunter Biden - who is absolutely at the center of the whole debacle with regard corruption and Trump's decisions - shouldn't be a witness because "he has no knowledge of the accusations."

Once again the Dems ties themselves in circles after Pelosi slow-played the process - despite exclaiming how critical and urgent it was.

Senator Lindsey Graham (R- S.C.) held nothing back in his disgust at the political "malarkey" under way. In an interview with "Fox News Sunday" anchor Chris Wallace, graham blasted that House Speaker Nancy Pelosi (D- C.A.) had "orchestrated the trial of holy hell" against the president next week.

Graham said from day one, Pelosi and Democrats waged war against Trump.

"You took 48 days to impeach this president," he told Wallace. "You did not allow him to call any witnesses. He could not have a lawyer present during the House Intel Committee. This has been a partisan railroad job. And you're asking for fairness in the Senate? You violated every norm of what we do."

Graham ended the interview by saying once the impeachment trial is over, the nation can start healing.

"This has been a political hit job. This is political revenge. What they're doing to the presidency is a danger to the institution itself," he warned.

The impeachment trial starts Tuesday, and this will be one of the most crucial moments of the Trump presidency as the Democrats have gone all-in.

Trump tweeted last week: "I JUST GOT IMPEACHED FOR MAKING A PERFECT PHONE CALL!"

Trump's legal team said Saturday the impeachment trial is "a dangerous attack on the right of the American people to freely choose their president."

"This is a brazen and unlawful attempt to overturn the results of the 2016 election and interfere with the 2020 election, now just months away," the legal team stated.

And one can't help but feel the Trump legal team and Graham are right when the schizophrenic blinkered perspectives of the House managers' media appearances (and liberal media acquiescence) is considered.