“That’s how we need to think about trade going forward, win or lose at the Supreme Court, wherever we end up,” Greer said. “This is a structure.” Greer said Trump’s current use of Section 232, which is not being challenged in the Supreme Court case, “covers a huge amount of trade in important, critical sectors”. This has allowed the Trump administration to impose sectoral tariffs, such as on steel and aluminium. As tariffs under Section 232 are not subject to legal challenge, even an adverse Supreme Court ruling will allow the administration to retain leverage. Similarly, under Section 301, the United States Trade Representative must complete an investigation within 12 months, with additional time for enforcement.