Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.) touted his Thursday vote against President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE's North American trade deal that was supported by several of the other candidates for the 2020 Democratic presidential nomination.

Sanders was the sole senator running in the Democratic presidential primary to vote against the U.S.-Mexico-Canada Agreement (USMCA), which passed the Senate on Thursday by a vote of 89-10. The deal, which replaces the North American Free Trade Agreement, passed the Democratic-controlled House by a vote of 385-41 in December.

“As one of the only candidates opposing Trump's trade deal, I want to thank Sen. @ChuckSchumer [D-N.Y.] for joining this fight,” Sanders said in a Thursday tweet praising the Senate minority leader’s vote against USMCA.

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“USMCA will make climate change worse. We will do better when I’m president.”

As one of the only candidates opposing Trump's trade deal, I want to thank Sen. @ChuckSchumer for joining this fight. USMCA will make climate change worse. We will do better when I’m president. https://t.co/b4ebWyh9rr — Bernie Sanders (@BernieSanders) January 16, 2020

Trump secured strong Democratic support for the agreement by including stronger labor law enforcement measures, scrapping protections on high-cost pharmaceuticals, and other provisions meant to protect American workers.

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The changes were enough to win over several of Trump’s Democratic challengers who’ve opposed prior trade deals, including Sens. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (Mass.), Amy Klobuchar Amy KlobucharThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill EPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates MORE (Minn.) and Michael Bennet Michael Farrand BennetOVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Senate Democrats demand White House fire controversial head of public lands agency Next crisis, keep people working and give them raises MORE (Colo.).

Warren, like other progressives backing USMCA, called the deal a solid step toward rewriting trade agreements to empower workers.

“We need a different approach to trade and it starts with the corruption of the giant corporations,” Warren said during Tuesday night’s Democratic primary debate.

But Sanders joined eight Democrats, including Schumer, in opposition to the agreement over a lack of environmental safeguards and insufficient measures to stop the outsourcing of U.S. jobs.

“We need to fundamentally rewrite our disastrous trade agreements and create and protect good-paying American jobs,” Sanders said Wednesday in remarks on the Senate floor.

Sanders’s opposition to USMCA draws a key distinction between himself and Warren, his chief rival for progressive primary voters, with less than three weeks until the Iowa caucuses. While Sanders and Warren are ideologically aligned on most issues, Sanders has sought to distinguish himself as the most progressive candidate running to unseat Trump.

Sanders's vote also provoked a rebuke from Trump's reelection campaign, elevating the senators' opposition.

"Socialist Bernie Sanders just proudly voted AGAINST new jobs and higher wages for Americans workers," the Trump campaign wrote in an email to supporters.

"Sanders is willing to sacrifice blue-collar jobs and better wages, even as he enjoys flying fossil fuel burning private jets on an almost daily basis," the email continued.