What Happened?

Steel and aluminum tariffs now sit at 50 percent for most countries. The Trump administration has launched 12 new national security trade investigations since taking office, covering everything from copper and semiconductors to wind turbines and medical supplies. The legal tool behind all of it is Section 232 of the Trade Expansion Act of 1962, a rarely used statute that gives the president broad power to restrict imports when the commerce secretary determines they threaten national security.

From 1962 through 1994, the U.S. initiated 24 total Section 232 investigations. That pace has turned a seldom-used legal authority into the centerpiece of U.S. trade policy, and it has forced Congress into a debate over who should control it.

Why Does it Matter to Me?

Section 232 tariffs raise the price of imported goods at the border. Those costs often pass through to manufacturers, contractors, and eventually consumers. Steel and aluminum tariffs affect the price of cars, appliances, and construction materials. The new investigations cover pharmaceuticals, commercial aircraft, robotics, and medical equipment, meaning the potential reach is broad.

The statute has no definition of "national security," which gives the executive branch wide latitude to decide what qualifies. The Trump administration has argued that "economic security is national security," a framing that critics say stretches the law far beyond its original purpose.

Both Sides, Now

Supporters of the current approach argue that a flexible definition of national security lets the U.S. respond quickly to economic threats and foreign competition. They point to bills like H.R. 2873 that would codify existing tariffs into law, and S. 172, which would expand the scope further.

Opponents say the broad interpretation gives the executive branch too much power over a tool that was meant for genuine defense emergencies, not general trade disputes. Bills including S. 1272 and H.R. 2665 would place new limits on presidential tariff authority. A Congressional Research Service report lays out both positions without recommending either. 2 lays out both positions without recommending either.

The tariffs have also created friction with trading partners. Several countries have challenged the duties at the World Trade Organization. At the July 1 review of the United States-Mexico-Canada Agreement (USMCA), the Trump administration declined to extend the agreement in its current form, triggering annual reviews that can continue through 2036.

Congress does have tools available. Lawmakers can amend the underlying statute, impose transparency requirements, or create approval mechanisms. A Government Accountability Office (GAO) ruling recently closed one avenue, finding that a Commerce Department report on copper imports was not subject to the Congressional Review Act, the law that lets Congress overturn certain agency actions.

What Happens Next?

Congress must decide whether to act on any of the pending bills. Some would expand presidential authority, some would restrict it, and at least one, S. 4563, would simply require Commerce to publish its investigation reports. None of the bills have cleared a full chamber vote. There is no scheduled floor vote on any of them, and the administration can continue opening new investigations under current law while Congress deliberates.

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