GOP Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (Ariz.) announced Wednesday he will oppose the nomination of Gina Haspel, President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's pick to lead the CIA, citing her ties to the controversial "enhanced interrogation" program used during the George W. Bush administration.

"Congress needs to be able to provide fully informed oversight. My questions about Ms. Haspel's role in the destruction of videotapes relevant to discussions occurring in Congress regarding the program have not been adequately answered," Flake said in a statement.

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Flake, a vocal critic of Trump who is set to retire after this year, is the third Republican senator to come out against Haspel, joining GOP Sens. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (Ky.) and John McCain John Sidney McCainCindy McCain endorses Biden: He's only candidate 'who stands up for our values' Biden says Cindy McCain will endorse him Biden's six best bets in 2016 Trump states MORE (Ariz.) in opposing her nomination.

Paul announced in March that he would oppose Haspel's nomination, while McCain came out against the Trump nominee earlier this month, citing her comments about torture during her confirmation hearing.

However, Haspel is expected to be confirmed after several Democrats backed her this week.

Flake had sent a letter to the Justice Department last week asking for Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE to give the full Senate access to the so-called Durham Report before her nomination arrived on the floor for a full vote.

The summary of the report, which details Haspel's involvement in the destruction of videotapes documenting the interrogation of an al Qaeda suspect, was shared with members of the Senate Intelligence Committee.

A spokeswoman for Flake didn't immediately respond to a request for comment Wednesday on whether the Justice Department responded to his letter.

Flake also appeared to point to Haspel's involvement in the broader Bush-era enhanced interrogation program — now widely viewed as torture — saying the country needs to "turn the page on the unfortunate chapter."

Still, despite Senate Republicans' narrow 51-seat majority, Flake's opposition won't be enough to sink Haspel's nomination. She needs the support of at least a few Democratic senators to overcome current GOP opposition and so far she has won over six Democrats: Sens. Mark Warner Mark Robert WarnerIntelligence chief says Congress will get some in-person election security briefings Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House approves bill to secure internet-connected federal devices against cyber threats MORE (Va.), Joe Manchin Joseph (Joe) ManchinThe Hill's Morning Report - Sponsored by Facebook - Trump, GOP allies prepare for SCOTUS nomination this week Trump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court MORE (W.Va.), Heidi Heitkamp Mary (Heidi) Kathryn HeitkampCentrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents Susan Collins set to play pivotal role in impeachment drama MORE (N.D.), Joe Donnelly Joseph (Joe) Simon DonnellyTrump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day MORE (Ind.), Bill Nelson Clarence (Bill) William NelsonDemocrats sound alarm on possible election chaos Trump, facing trouble in Florida, goes all in NASA names DC headquarters after agency's first Black female engineer Mary W. Jackson MORE (Fla.) and Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE (N.H.).

The Senate could vote on Haspel's nomination as soon as Thursday after the Senate Intelligence Committee advanced her nomination earlier this week. If Republicans want to confirm her this week they'll need cooperation from Democrats. Otherwise, a vote will slide to early next week.

Haspel's background as a career CIA officer who played a role in the agency's use of interrogation and detention policies viewed as torture has been the key debate in her confirmation process.

Critics of Haspel argue that her work in the post-Sept. 11 CIA was disqualifying for someone who wanted to lead the agency.

But her defenders, which include top Obama administration officials, argue that she is a veteran CIA official and highly qualified to run the agency. They argue she was following orders in the environment that followed the deadliest terrorist attack in U.S. history.