Small-business owners sued over Trump’s tariffs, saying they had severely disrupted their businesses.The outcome is likely to turn on three doctrines that have been championed by the Supreme Court’s conservatives. WASHINGTON — The Supreme Court’s conservatives face a test of their own making this week as they decide whether President Trump had the legal authority to impose tariffs on imports from nations across the globe.At issue are import taxes that are paid by American businesses and consumers. Small-business owners had sued, including a maker of “learning toys” in Illinois and a New York importer of wines and spirits. They said...