Why the Tariff Case Was Never Just About Tariffs

Brent Skorup

In 2029, a Democratic president declares a climate emergency. She doesn’t go to Congress. She doesn’t issue new regulations through the EPA. Instead, she invokes the International Emergency Economic Powers Act, cites a national security finding linking fossil fuels to foreign adversaries, and by executive order bans the importation of gasoline-powered vehicles entirely. The statutory hook is the IEEPA’s broad authorization to regulate and halt trade during a declared emergency—the same one the Trump administration used for tariffs. 

The foreign-policy veneer writes itself: China’s coal economy creates climate refugees, Russian oil revenues undermine Ukrainian political institutions, and American dependence is a strategic vulnerability. If the Supreme Court had ruled the other way in Learning Resources v. Trump, that president would have had a clear roadmap—and no serious legal obstacle.

What critics on the right miss—and critics on the left downplay—is that Learning Resources was never just about tariffs.

The popular media and progressive narrative—that the Roberts Court is a rubber stamp for the Trump administration—were always overstated. Learning Resources puts that narrative to rest. It belongs alongside Youngstown Sheet & Tube v. Sawyer (1952) as one of the most significant judicial rejections of executive power. In Youngstown, the Court ruled 6–3 against President Truman’s seizure of steel mills to support American soldiers fighting communists in Korea. 

Truman had reason to expect deference—all nine justices were Democratic appointees, American forces had suffered over 100,000 casualties, and Truman’s own predecessor, President Roosevelt, had nationalized plants in peacetime in 1941 without judicial interference. The Court held firm anyway. Learning Resources carries similar institutional weight.

Now, the legal critique. John Eastman—like the dissenters, Justices Kavanaugh, Thomas, and Alito—argues that IEEPA, “under normal principles of statutory construction,” authorizes the president’s tariffs. The term “regulate importation” has been contested, and Nixon imposed 10 percent tariffs under a different law but identical statutory language in 1971; courts upheld him. In foreign affairs, Congress often paints with a broad brush, and courts have typically deferred to the president.

These are not frivolous arguments. But the critics are missing something on both the law and the policy.

On the law: tariffs are not only a foreign affairs matter—they are a type of tax and revenue raiser, and the constitutional power to lay and collect duties is vested exclusively in Congress. Eastman invokes the Court’s sweeping dicta in United States v. Curtiss-Wright Export Corp. (1936) about the president as “sole organ” in foreign affairs, but Chief Justice Roberts—writing in dissent in Zivotofsky (2015)—has already noted that the Court’s precedents have “never accepted such a sweeping understanding of executive power.” Foreign affairs deference has limits, and those limits are most important when the president shares power with Congress.

On the policy, the critics overlook that this theory is a gift to the administrative state. For decades, presidents of both parties have increasingly relied on unilateral action when Congress stalls. Emergency declarations have become routine tools of governance, and courts have often acquiesced, especially where foreign policy or national security is invoked. 

The Roberts Court has charted a different course, embracing the major questions doctrine—requiring Congress to speak clearly before the executive may decide issues of vast economic and political significance. That framework has already constrained Democratic administrations: the Court rejected the Biden administration’s rule changes involving student-loan forgiveness, climate and emissions regulation, and COVID-19 vaccine mandates on major questions grounds.

Eastman further argues that tariffs “wear two hats”—simultaneously as taxes and foreign-policy instruments—and that a president’s tools of foreign policy overshadow Congress’s power. But accepted without limits, this argument collapses much of domestic policy into foreign affairs. Public health, carbon emissions, technology policy, financial privacy—all have international dimensions. Under Eastman’s logic, a president could invoke emergency authority and reshape vast sectors of the domestic economy while claiming the mantle of foreign affairs. The category eats everything.

The Court in Learning Resources drew a line. It refused to read sweeping economic powers into a statute that doesn’t clearly grant them, and it applied that discipline in a foreign-affairs context where it has historically been most reluctant to do so. That’s a meaningful development in the Court’s originalist project—a check not just on this president’s tariff powers but also on the system of emergency governance that every future president will inherit.

For conservatives frustrated by the outcome, the world in which emergency laws are read with broad deference to the president is a world the next progressive administration inherits in full. For progressives tempted to dismiss Learning Resources as a one-off: the Court—designed by the Framers as the weakest branch of government—just rejected a president’s foreign policy priority. 

It is a sign of the health of the republic that the Court can reject a president’s foremost foreign policy priority—and that the president respects that decision.

Source: https://www.cato.org/blog/why-tariff-case-was-never-just-about-tariffs