Administration lawyers say the national trade deficit and fentanyl crisis constitute emergencies that let the president invoke the law and impose tariffs on trillions of dollars of trade. Photo by Ricky Carioti/Postmedia files

President Donald Trump’s three United States Supreme Court appointees will play pivotal roles as the court considers the fate of his signature global tariffs Wednesday.

Each of the three — Neil Gorsuch, Brett Kavanaugh and Amy Coney Barrett — has generally backed the president in a blizzard of emergency orders this year letting Trump implement his policies temporarily.

But the tariff case will be the first time the court and its six-to-three Republican-appointed majority have directly considered Trump’s underlying assertions of sweeping presidential powe

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