Trump’s Tax Returns Put Supreme Court Back in Political Storm

The U.S. Supreme Court is set to hear what could become the biggest cases involving Donald Trump as president, a pair of constitutional clashes that could insulate chief executives from investigations while in office and add an explosive new element to the 2020 election campaign.

Trump is trying to keep House Democrats and a New York prosecutor from seeing his financial records. The high court will hear back-to-back arguments Tuesday -- by phone and live-streamed because of the coronavirus outbreak -- on Trump’s efforts to block his banks and accountants from complying with subpoenas they have received.

The court’s rulings ...