After lower courts struck down the legal argument for the Trump administration’s most sweeping tariffs, the Supreme Court now takes up the matter. The case is important not only for the economic policy of the United States, but for the Constitution’s separation of powers. Also: today’s stories, including how one biologist in Libya plans to protect critically endangered Mediterranean angel sharks, how 2025 election results in the U.S. will be closely watched for signs of growing or waning political support for Republicans and Democrats, and how Israelis are grappling with the notion of trusting an international force to preserve the fragile Gaza ceasefire. Join the Monitor's Clay Collins for today's news.