Democrats on Sunday said they were concerned that statements from several GOP senators showed they wouldn't be impartial jurors during President Trump's Senate impeachment trial.

At the heart of the controversy are Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellHawley warns Schumer to steer clear of Catholic-based criticisms of Barrett Senate GOP set to vote on Trump's Supreme Court pick before election Harris slams Trump's Supreme Court pick as an attempt to 'destroy the Affordable Care Act' MORE’s (R-Ky.) remarks last week that he’ll be in “total coordination” with the White House on impeachment.

Democrats said that goes against the oath senators will take before the start of the trial.

“It's why I'm so disappointed in my colleagues, this see-no-evil, hear-no-evil attitude,” Sen. Sherrod Brown Sherrod Campbell BrownMnuchin says he and Pelosi have agreed to restart coronavirus stimulus talks Harris faces pivotal moment with Supreme Court battle Remote work poses state tax challenges MORE (D-Ohio) said Sunday on CNN’s “State of the Union.” “They don’t want to look at anything that might disagree with their world view of Republicanism and this president.”

Brown said he had “very strong feelings” about Trump's conduct and supported impeachment but added that he won’t make a decision until after he hears evidence at trial about whether Trump's actions rise to the level of removal from office.

Similarly, Sen. Dick Durbin Richard (Dick) Joseph DurbinHawley warns Schumer to steer clear of Catholic-based criticisms of Barrett Two Judiciary Democrats say they will not meet with Trump's Supreme Court pick Sunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election MORE (D-Ill.) said on CBS’s “Face the Nation” that senators need to "consider evidence" in order to have an "actual trial" and urged McConnell to sit down with Senate Minority Leader Chuck Schumer Chuck SchumerPelosi: Trump Supreme Court pick 'threatens' Affordable Care Act Will Democrats attempt to pack the Supreme Court again? Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' MORE (D-N.Y.) to ensure a trial happens in a "proper" and "bipartisan" way.

Some Republican senators have signaled they already know which way they’ll vote at the end of the expected Senate trial.

“I am clearly made up my mind. I'm not trying to hide the fact that I have disdain for the accusations in the process. So I don't need any witnesses,” Sen. Lindsey Graham Lindsey Olin GrahamHarris slams Trump's Supreme Court pick as an attempt to 'destroy the Affordable Care Act' Sunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election Confirmation hearing for Trump's Supreme Court pick to start Oct. 12 MORE (R-S.C.) said on “Face the Nation.”

“I am ready to vote on the underlying articles. I don’t really need to hear a lot of witnesses,” he added.

Sen. Ted Cruz Rafael (Ted) Edward CruzSenate GOP set to vote on Trump's Supreme Court pick before election Supreme Court fight pushes Senate toward brink Crenshaw looms large as Democrats look to flip Texas House seat MORE (R-Texas) said that, like his Democratic colleagues, he fully intends to follow his oath.

"But the oath of a Senate juror, it has some similarities to a criminal trial, but it has some differences as well," Cruz added on ABC's "This Week," pushing back on accusations that McConnell's and Graham’s statements have in any way violated the oath senators will take.

“This remains a political process,” Cruz said. “The framers knew what they were doing when they put it into the political branches.”

Sen. Rand Paul Randal (Rand) Howard PaulRon Paul hospitalized in Texas The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Rand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case MORE (R-Ky.) on "State of the Union" predicted that no Senate Republicans will vote to remove Trump and accused Democrats of attempting to “criminalize politics” by trying to impeach trump over a “disagreement.”

He dismissed allegations that Trump did anything wrong and said the process was moving forward because “people on the Democratic side don’t like President Trump.”

Pam Bondi, the former Florida attorney general who recently joined Trump's impeachment messaging team, also pushed back over concerns that the Senate working with the White House blocks senators from being impartial jurors.

“These are the senators who will decide if our president is impeached, which will not happen. We should and will work hand in hand with them,” she said on “Fox News Sunday.”

Trump is expected to be acquitted in the Republican-controlled Senate; no Republican senators have publicly signaled they would vote to remove Trump.

House Intelligence Chairman Adam Schiff Adam Bennett SchiffSchiff to subpoena top DHS official, alleges whistleblower deposition is being stonewalled Schiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power MORE (D-Calif.) said Trump’s acquittal in the Senate would not mean impeachment was a “failure” for House Democrats.

“At least it's not a failure in the sense of our constitutional duty in the House,” Schiff said on ABC’s “This Week.”

House Judiciary Chairman Jerrold 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.) also brushed off the suggestion that Democrats failed their own “test” by not garnering Republican support.

“This is a continuing threat to the integrity of our elections now,” Nadler said on "This Week". “This is not a one-off. Impeachment is not a punishment for past behavior.”

“He poses a continuing threat to our national security and to the integrity of our elections, to our Democratic system itself,” Nadler added. “We cannot permit that to continue.”