Sen. Bernie Sanders said at the Democratic debate on Thursday night that the USMCA free trade deal that President Trump negotiated is a "modest improvement" over NAFTA, but that he will not vote for it because it will not stop outsourcing to Mexico and does not mention climate change.

Why it matters: The House overwhelmingly passed the USMCA on Thursday after Democrats secured certain labor provisions. Passing the deal is one of Trump's top policy goals of 2019 and is tailor-made for protectionist Democrats, but Sanders — who has long opposed free trade agreements — still plans to vote against it when it reaches the Senate.