A lively argument spanning almost three hours featured illuminating exchanges that tested the usual commitments of some of the justices on the right side of the court.

The odds of the Supreme Court upholding President Donald Trump’s signature economic policy plummeted on Wednesday after two key justices sounded skeptical of the government’s arguments. Online better markets showed the odds of the justices ruling in Trump’s favor in a pair of challenges to his sweeping tariffs fell by about 50 percent after the justices heard oral arguments in the cases.

There is so much data out there that the sheer volume could potentially sway markets and influence investment decisions. All of it makes strategic decisions harder to identify. This article aims to provide an in-depth analysis of the five key events ...

The Supreme Court is considering whether the president acted legally when he used a 1977 emergency statute to impose tariffs on scores of countries.