Supreme Court ruled 6-3 against Trump's tariff imposition.
Trump expressed his disdain for Justices Barrett and Gorsuch.
The ruling was based on the International Emergency Economic Powers Act.
Briefing: Trump says Justices Barrett, Gorsuch ‘sicken me’ after Supreme Court tariff ruling
Strategic angle: The Supreme Court ruled against President Trump's authority to impose tariffs, prompting a strong reaction from the former president.