Clashing over Commerce summary

When the United States ratified its Constitution in 1788, it had no income tax, no central bank, and barely any federal infrastructure. What it did have was the power to tax imports – and that quickly became the foundation of its finances. By the early 1790s, tariffs on foreign goods were covering nearly all federal expenses, from paying war debts to funding the military. Unlike direct taxes, which were unpopular and hard to enforce, import duties were easier to collect and politically less risky. Ships arrived at a few major ports, and customs officers could tax their cargo right at the docks.

But tariffs weren’t just about raising money. From the beginning, they sparked debate about the government’s role in shaping the economy. Some lawmakers saw tariffs as a way to support domestic manufacturing by making imported goods more expensive. Others feared this would hurt consumers and spark trade retaliation. Still, many agreed that tariffs were the most dependable revenue source the country had.

In 1861, the average US tariff rate on dutiable imports was already high by global standards. By the end of the Civil War, it had jumped even higher – and unlike wartime taxes, it never came back down. For nearly 70 years after the war, tariffs became a defining feature of American economic policy. What had started as a financial necessity in the early republic hardened into a political doctrine. Protectionism – the use of tariffs to shield domestic industries from foreign competition – wasn’t just tolerated, it was actively championed, especially by the Republican Party, which held power for much of this period and drew its base from the industrial North.

The argument was straightforward: shielding American manufacturers from foreign competition would help develop national industry and provide jobs. That pitch resonated especially in states with heavy industry, from Pennsylvania’s steel mills to New England’s textile towns. But it came at a cost. Southern and western farmers, who relied on exporting crops and buying imported goods, saw high tariffs as a burden. They had to pay more for consumer products while receiving no direct benefit. This sectional divide over trade policy became one of the defining political conflicts of the late nineteenth century.

When the United States passed the Smoot-Hawley Tariff in 1930, it pushed import duties to their highest levels since the Civil War. It was meant to protect American farmers and manufacturers from the effects of the global downturn – but instead, it deepened the crisis and triggered foreign retaliation. Within a few years, trade had collapsed, unemployment had soared, and confidence in protectionism was badly shaken. What followed was the beginning of an entirely new approach to policy.

In 1934, Congress passed the Reciprocal Trade Agreements Act, a landmark law that shifted the power to negotiate tariffs from Congress to the president. For the first time, US trade policy moved away from unilateral protection and toward bilateral cooperation. The idea was simple: the US would lower some of its duties in exchange for similar concessions from other countries. This reduced tariffs and began to reframe trade as a tool of diplomacy, not just economics.

By the late 1940s, US tariffs had fallen to levels not seen since the nineteenth century – but what’s more striking is how little political backlash there was. For the first time in American history, reducing trade barriers had become a shared goal across party lines. The trauma of the Great Depression and World War II had reshaped views on international commerce. Trade wasn’t just about economic efficiency anymore – it was part of a larger strategy to rebuild global stability, contain communism, and cement America’s influence abroad.

This new logic underpinned a decades-long bipartisan consensus. The US continued to expand its commitments under GATT, holding successive negotiation rounds that gradually brought down tariffs. The president, backed by renewed Trade Promotion Authority from Congress, led negotiations. And despite political shifts in Washington, support for liberal trade policy remained remarkably steady from Truman through Nixon.

When the US signed the North American Free Trade Agreement, or NAFTA, in 1993, it was backed by both a Democratic president and a Republican Congress. That kind of bipartisan support had defined trade policy for decades. But behind the scenes, the political ground was already shifting. NAFTA passed by a narrower margin than previous trade deals, and opposition wasn’t just coming from labor unions – it was starting to cut across party lines. As globalization accelerated in the 1990s, the old consensus began to crack.

The end of the Cold War removed the geopolitical rationale that had helped sustain trade liberalization. Meanwhile, the global economy changed in ways few had predicted. The creation of the World Trade Organization, or WTO, in 1995 brought new disputes over rules and enforcement. China’s entry into the WTO in 2001 opened up vast new markets, but also exposed American workers to fierce competition. Entire industries were hollowed out, especially in manufacturing-heavy regions. While consumers benefited from cheaper goods, the economic dislocation hit hard in places with few alternatives.