The Liberty Justice Center led by Sara Albrecht is better known for backing right-leaning causes, but it filed the tariff case that will be heard by the Supreme Court this week.
The justices face a so-called legitimacy dilemma as they deal with a tricky legal dispute and a president who has made clear he would view defeat as a personal insult.
Experts say the case is a tossup that poses difficult considerations for the justices, made all the more tense by President Trump’s efforts to personalize the dispute.