A growing list of Republican senators are calling for the findings of an FBI investigation into sexual assault allegations against Supreme Court nominee Brett Kavanaugh to be made public following their release.

GOP Senate leaders expect the FBI to provide its supplementary background report as early as Wednesday, allowing them to vote on the nominee Friday or Saturday.

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Under its original one-week timeline, the bureau has until Friday to finish its investigation. But Republicans had hoped the FBI would finish its investigation early, allowing them to vote on Kavanaugh by the week's end. Senators expect the bureau to hand over notes and transcripts for review ahead of their vote.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Senate GOP aims to confirm Trump court pick by Oct. 29: report Trump argues full Supreme Court needed to settle potential election disputes MORE (R-Ky.) said Tuesday that the report would be open to review by each senator, but would not be released to the public — a determination that has drawn concerns from Democrats and some Republicans, who say that at least part of the findings should be made public.

"We'll get an FBI report soon. It will be made available to each senator and only senators will be allowed to look at it," McConnell told reporters Tuesday. "That's the way these reports are always handled."

But some senators have argued that, unless the report is made public, the FBI's work could be selectively leaked and spun by both sides.

Sen. John Kennedy John Neely KennedyMORE (R-La.) said Wednesday that McConnell should see to it that the FBI report's findings, or at least a summary, are made public.

“I hope the FBI report is made public. Normally it’s not,” Kennedy said, according to Reuters.

“I personally think that would be a good idea,” Senate Majority Whip John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (R-Tex.) said Tuesday. “In this instance, I don’t know how you can accuse somebody of the terrible things that Judge Kavanaugh has been accused of and have people satisfied without some sort of summary of what the FBI found.”

Senate Republican Conference Chairman John Thune John Randolph ThuneSenate GOP sees early Supreme Court vote as political booster shot Romney backs pre-election Supreme Court vote, paving way for McConnell, Trump Senate GOP faces pivotal moment on pick for Supreme Court MORE (S.D.) said that “in these circumstances,” the FBI report would be made public.

Sen. Thom Tillis Thomas (Thom) Roland TillisThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting OVERNIGHT ENERGY: EPA head questions connection of climate change to natural disasters | Pebble Mine executives eye future expansion in recorded conversations | EPA questions science linking widely used pesticide to brain damage in children Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight MORE (R-N.C.), who sits on the Judiciary Committee, said he saw no issue with part of the investigation's findings being made public.

“This is a supplemental background investigation,” Tillis said in statement obtained by The Washington Post. “We should explain to people what that means. They don’t draw conclusions; they gather information. It’s left up to us to draw conclusions.”

"I'm actually of the view that whatever could be made public here, should be. But that would be well outside the normal way these things are treated," Sen. Roy Blunt Roy Dean BluntSocial media platforms put muscle into National Voter Registration Day Senate GOP faces pivotal moment on pick for Supreme Court This week: Supreme Court fight over Ginsburg's seat upends Congress's agenda MORE (R-Mo.), a member of leadership, told reporters.

Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R-Tenn.), on Tuesday, explained that he wanted at least part of the report made public.

“I’m afraid if somehow or another we don’t make [the report] public both sides will be very selective with what they share with y’all,” he told reporters.

But Senate Judiciary Committee Chairman Chuck Grassley Charles (Chuck) Ernest GrassleyCollins says she will vote 'no' on Supreme Court nominee before election The Hill's Morning Report - Sponsored by Facebook - Trump, GOP allies prepare for SCOTUS nomination this week Gardner signals support for taking up Supreme Court nominee this year MORE (R-Iowa) has expressed concern that releasing the report publicly could discourage future witnesses from cooperating with the FBI, given the sensitive material of the investigation and interviews with those who prefer to remain confidential.

“I think that if you did anything different than it’s been done in all the years I’ve been in the Senate, you might actually hurt the FBI getting the information they want,” Grassley said in a statement obtained by The Post.

"I've been reading FBI reports for 38 years. None of them have ever been made public," he said.

The White House initially narrowed the scope of the FBI's investigation into sexual assault allegations leveled against Kavanaugh, NBC News reported Sunday. One day later, the White House reportedly gave the FBI a green light to interview anyone deemed appropriate in its investigation after Democrats criticized the Trump administration for "micromanaging" the bureau.

As of Wednesday, the FBI had not received clear authority from the White House to interview Kavanaugh or Christine Blasey Ford, the first woman to accuse him of sexual assault, according to Bloomberg.