Democrats are set for a serious fight over banking regulations this week as Republicans bring a bill to the floor that liberals say is a significant rollback of the Wall Street reform bill signed into law by former President Obama.

The battle pits moderate Democrats up for reelection this year in states such as Missouri, West Virginia, North Dakota and Montana against Sen. Elizabeth Warren Elizabeth WarrenGOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (D-Mass.) and other progressives, and comes as the party braces for primary fights between the left and center.

The bipartisan measure to roll back critical parts of the Dodd-Frank Act is expected to pass the Senate within days, with the first procedural vote scheduled for Tuesday.

Moderate Democrats and Republicans who support the bill call it a long-overdue step to free community banks and credit unions from unnecessary regulations.

Liberal critics of the legislation, including some Democrats seen as potential White House candidates in 2020, say it uses small institutions as cover for loosening rules on major banks, putting the entire economy at risk.

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“If we lose the final vote next week, we’ll be paving the way for the next big crash,” Warren said. “It’s time for the rest of us to fight back and demand that Washington work for us, not the big bank lobbyists.”

Sponsored by Senate Banking Committee Chairman Mike Crapo Michael (Mike) Dean CrapoBottom line Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump Top GOP senator urges agencies to protect renters, banks amid coronavirus aid negotiations MORE (R-Idaho), the bill is the result of years of talks between Republicans and Democrats who are worried about the impact that Dodd-Frank has had on smaller financial firms and banks.

The legislation is expected to clear a filibuster easily, with Sen. 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 (D-Va.) predicting it could receive close to 70 votes. Sponsors are making changes to the bill in hopes that it can also pass the House.

The Democratic backers include Sens. Claire McCaskill Claire Conner McCaskillMomentum growing among Republicans for Supreme Court vote before Election Day Democratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally MORE (Mo.), Joe Manchin Joseph (Joe) ManchinNames to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day Gardner on court vacancy: Country needs to mourn Ginsburg 'before the politics begin' 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 DonnellyNames to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day Barrett seen as a front-runner for Trump Supreme Court pick MORE (Ind.) and Jon Tester Jonathan (Jon) TesterPence seeks to boost Daines in critical Montana Senate race This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans Filibuster fight looms if Democrats retake Senate MORE (Mont.), all of whom are up for reelection this year in states won by President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE.

Those senators are using the bill to flex their bipartisan bona fides, saying it shows that they are not beholden to any party when it comes to solving problems.

“When you don’t respond to these kinds of legitimate concerns from small lenders, there’s a resentment to the overall policy,” Heitkamp said. “We tend to throw the baby out with the bathwater with that kind of frustration.”

Those Democrats also said the bill can help community banks hold their own against encroaching Wall Street titans and revitalize lagging rural economies.

“I don’t think for a second that Dodd-Frank is the only reason we’re seeing consolidation in banking,” Tester said. “Technology plays a big role in that. Population shifting plays a big role in that. But on this committee, I can deal with Dodd-Frank.”

The White House has touted the bill as well. Gary Cohn, Trump’s top economic aide, said he expects the president to sign it if it passes Congress.

Trump has pledged to “dismantle” Dodd-Frank, and has talked with several banking lobbying groups about rolling back the law. He met last week with credit union advocates, who said afterward that the president had pledged to do anything he can to remove red tape for them.

The bill would exempt all banks with less than $250 billion in assets from tighter Federal Reserve oversight by raising the threshold at which a bank or firm is considered “systemically important.”

Under Dodd-Frank, banks with more than $50 billion in assets are subject to yearly stress tests and higher capital requirements and must submit an annual “living will” to explain how the firm could be liquidated without causing a financial crisis. The Crapo bill raises that threshold to $250 billion, freeing more than 20 banks and financial firms from those rules, and exempts banks with less than $100 billion from Dodd-Frank stress tests.

The bill also includes measures designed for smaller firms. It exempts banks that extend 500 or fewer mortgages a year from reporting home loan data to federal regulators and broadens the definition of qualified mortgages.

The Democratic feud over the bill spilled out into the open during a Senate Banking Committee hearing on Thursday, where Warren and Sen. Sherrod Brown Sherrod Campbell BrownBipartisan praise pours in after Ginsburg's death Emboldened Democrats haggle over 2021 agenda Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election MORE (D-Ohio), the committee’s ranking member, were vocal critics. They have dubbed the legislation the “Bank Lobbyists Act.”

“We’ve been down this road before. Whenever things are going ok in the financial system, the lobbyists flood the halls of Congress & convince politicians to roll back the rules — because what could possibly go wrong?” Warren tweeted.

Liberals claim the legislation is a stalking horse for helping banks. They say the measure would deregulate 25 of the 38 largest U.S. banks, benefiting firms that received billions of dollars in federal bailout money during the 2008 crisis.

Several major regional banks, including SunTrust, BB&T, Citizens, Fifth Third, M&T and BMO Financial Corp., are below the $250-billion threshold, putting them among the bill’s biggest beneficiaries. Those banks all have at least $100 billion in assets, with some coming close to the bill’s new threshold.

A bill truly intended to help smaller firms, liberals say, would not include banks like those.

“I hear your talk about your interest primarily in the smaller banks, but the question still stands, why should we do anything for the largest banks?” Brown said. “Why should we do anything for banks that have consistently failed to follow the rules?”

The bill’s backers say regulators will still have ample power to police risk in the financial system, noting that the largest U.S. banks will still face strict Fed oversight. They’ve pointed to comments supportive of the bill from Fed Chairman Jerome Powell.

But Democrats opposing the measure fear that the Fed could deregulate the U.S. subsidiaries of major foreign banks like Barclays, Deutsche Bank, UBS and Credit Suisse. Each has holdings of less than $250 billion in the U.S., bur far more when counting foreign assets.

Critics have also raised concerns that exempting smaller banks from mortgage data reporting would make it harder for the government to crack down on racial discrimination in lending.

Democrats backing the push are not swayed by those arguments.

“I think those views are a myth, and certainly not in the text,” Tester said. “But I’m a dirt farmer, OK? I just kind of read things as they are and don’t read a whole lot of extra stuff into it.”