President Trump's tariffs may be his most visible trade policy, but the deeper, longer-lasting shift could be the partisan realignment they've triggered. Democrats, once free-trade advocates, are now questioning not just the costs of tariffs but the executive authority used to impose them. This could lead to a permanent change in how Congress and the White House share power over trade.
On the campaign trail, Democrats highlight how tariffs raise costs for American families, undermining affordability. A January poll by the Council on Foreign Relations and Morning Consult found that over 65% of respondents believe tariffs make everyday goods less expensive. But Democrats are going further, challenging the legal basis for these tariffs and pushing for structural reforms.
After the Supreme Court rejected Trump's use of the International Emergency Economic Powers Act for sweeping tariffs, the administration pivoted to other statutes. However, those efforts have also faced legal setbacks. In May, the Court of International Trade ruled that Trump's 10% tariffs exceeded the authority Congress delegated under Section 122, rejecting the administration's claim that the trade deficit constitutes a "large and serious" balance-of-payments problem. That decision is on hold pending appeal.
Trump's Section 301 "forced labor" tariffs are also under review. The court questioned whether the government established the required connection between each targeted country's conduct and the statutory basis for the tariffs. Without that nexus, Section 301 could become a permanent trade war tool rather than a targeted remedy, as Congress intended.
These cases test the limits of executive tariff powers, but Democrats are asking whether those limits are too broad. In July, Senator Ron Wyden (D-Ore.) introduced the Congressional Trade Powers Reform Act of 2026, which would require congressional approval for new presidential tariffs, create a bipartisan Joint Committee on Tariffs and Trade, and increase oversight of the U.S. Trade Representative. Wyden said the goal is to reverse executive overreach and put Congress "back in the driver's seat."
In September, Senate Democrats offered more targeted proposals. Senator Jacky Rosen (D-Nev.) introduced a resolution focusing on Trump's use of Section 338 of the Tariff Act of 1930 to impose tariffs on Canadian goods. The resolution argues these duties raise costs, disrupt North American supply chains, and invite retaliation. Rosen and colleagues also proposed the BAD DEAL Act, which would repeal Section 338, nullify actions taken under it, and refund collected duties.
Senate Democratic Leader Chuck Schumer (D-N.Y.) went even further with the End Trump's Tariff Tax Act, which would terminate Section 301 forced labor tariffs, repeal Sections 122 and 338, and automatically refund duties with interest.
These proposals are currently political markers, but they could become policy agendas. For Republicans, the question is how much of Trump's tariff regime they will defend. Some have already opposed certain tariffs or called for more congressional oversight. After Trump leaves office, Republicans might return to their traditional preference for lower tariffs and open markets, as economists Phil Gramm and Donald Boudreaux argue.
For Democrats, the challenge is defining their critique. If the objection is presidential overreach, clawing back authority may suffice. But if tariffs inherently raise prices and disrupt supply chains, the party must decide when tariffs are ever useful and how to avoid the economic costs they now decry.
Trump has upended the politics of U.S. trade. The question is whether the parties will revert to old positions or embrace a new balance of power. If they don't, Trump's most lasting trade legacy may be the partisan realignment he leaves behind—one that could reshape U.S. trade policy for decades.
