Treasury Secretary Jack Lew Jacob (Jack) Joseph LewApple just saved billion in tax — but can the tax system be saved? Lobbying World Russian sanctions will boomerang MORE on Wednesday said he still believes Congress could vote to ratify a broad Asia-Pacific trade deal, despite some high-profile opposition.

Days after Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (R-Ky.) predicted the Trans-Pacific Partnership (TPP) would not receive a vote before President Obama leaves office at the end of the year, the administration is singing a different tune.

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Speaking at the Brookings Institution, Lew acknowledged that there were challenges ahead for getting the deal done, but he remained committed.

“We think it will be done this year, and we’re going to do whatever we can to make that happen,” he said, when asked what message he would give his Asian counterparts.

Lew’s comments make clear that the administration is not going to give up on getting Congress to ratify the trade deal, even as vulnerable lawmakers and top politicians come out against the package.

The presidential nominees for both parties, Republican Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE and Democrat Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE, have both announced opposition to the deal. And the leaders in both chambers of Congress have been far from optimistic about getting it passed.

Earlier this month, McConnell was blunt when he described the chances of the TPP receiving a vote during the lame-duck session of Congress after the general election.

“The current agreement … which has some serious flaws, will not be acted upon this year," he said at the Kentucky State Farm Bureau breakfast.

Meanwhile, Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.), who generally is supportive of trade deals, doubted he had the votes to get it passed in the House.

But Lew indicated that the president plans to use his final months in office to mount a full campaign to get the TPP through, while acknowledging a “complicated” political environment.

“The president remains committed to getting it done and will use every ounce of energy he and the rest of us in the administration have to pushing it forward,” he said.