The Supreme Court‚ in its last argument of the term‚ will consider on Thursday whether former President Donald J. Trump must face trial on charges that he plotted to subvert the 2020 election. The court’s answer to that question will be a major statement on the scope of presidential power. Depending on its timing and content‚ the decision will also help determine whether Mr. Trump’s trial will start before the election‚ in time to let both jurors and voters evaluate the evidence that Jack...