Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellSenate gears up for battle over witnesses in impeachment trial McConnell: I doubt any GOP senator will vote to impeach Trump McConnell says he'll be in 'total coordination' with White House on impeachment trial strategy MORE (R-Ky.) on Friday tried to tamp down the political backlash over the Senate Intelligence Committee's decision to subpoena Donald Trump Jr.Donald (Don) John TrumpMelania Trump's 'Be Best' hashtag trends after president goes after Greta Thunberg Trump Jr. blasts Time for choosing 'marketing gimmick' Greta Thunberg as Person of the Year White House calls Democratic witness's mentioning of president's youngest son 'classless' MORE, urging the president "not to worry."

"I know the president's upset about that, but I think he ought not to worry about it. The chairman of the Intelligence Committee has already said the committee, when it reports, will find no collusion," McConnell told WHAS, a Kentucky radio station.

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McConnell's comments come after Intelligence Committee Chairman Richard BurrRichard Mauze BurrGOP senators request interview with former DNC contractor to probe possible Ukraine ties North Carolina congressman says he won't seek reelection after redistricting Senate passes bipartisan bill to permanently fund historically black colleges MORE's (R-N.C.) decision, in conjunction with Vice Chairman Mark WarnerMark Robert WarnerTikTok chief cancels Capitol Hill meetings, inflaming tensions Watchdog report finds FBI not motivated by political bias in Trump probe Ex-Rep. Scott Taylor to seek old Virginia seat MORE (D-Va.), to subpoena Trump Jr. sparked intense division among Senate Republicans.

Several — including Burr's fellow senator from North Carolina, Thom TillisThomas (Thom) Roland TillisSenators zero in on shadowy court at center of IG report Democrats spend big to put Senate in play Group of veterans call on lawmakers to support impeachment, 'put country over politics' MORE (R), who is up for reelection — were critical of Burr on Thursday.

But McConnell, during Friday's radio interview, defended the Intelligence Committee, noting that its years-long investigation into the 2016 election and Russian interference had remained bipartisan.

"This Intelligence Committee in the Senate, unlike the Intel Committee in the House, has not descended into partisan bickering. It's been a largely bipartisan effort. Chairman Burr has indicated that they'll be reporting very soon," McConnell said.

He added that "we ought to just take a deep breath and understand that this episode is coming to an end."

The decision by Burr and Warner to subpoena Trump Jr. comes as members of the Intelligence Committee say they are trying to wrap up their investigation, and subsequent reports, by August. The decision appeared to catch a number of Senate Republicans off guard, with several members of the committee indicating that they hadn't been given a heads up.

Trump said on Thursday that he was "surprised," adding that he "saw Richard Burr saying there was no collusion two or three weeks ago."

Burr, in a closed-door GOP lunch on Thursday, detailed the steps that he and Warner had taken to try to set up a time to talk with Trump Jr. before issuing the subpoena. McConnell also reportedly defended Burr during the lunch.

McConnell also predicted to Fox News's Sean HannitySean Patrick HannityMcConnell: I doubt any GOP senator will vote to impeach Trump McConnell says he'll be in 'total coordination' with White House on impeachment trial strategy Huckabee teases Hannity appearance, says he'll explain why Trump is eligible for third term MORE on Thursday night that "this is going to have a happy ending."

“I understand the president’s frustration here. But I think that this is just a blip," he said. "I think that the case is closed. I think that the controversy has been concluded.”