Has America’s fever broken? An optimist could make a case. Donald Trump, the central figure in America’s febrile ailment, was further tarnished this past week, including by the conviction of his company for fraud. Trump wasn’t personally in the dock, but his reputation was — and the fraud involved checks he personally signed. Meanwhile, the Senate Republican candidate whom Trump anointed in Georgia was defeated on Tuesday. That came after a midterm election in which some prominent Trump-backed candidates were trounced. Trump’s willingness to socialize with Nazi sympathizers and his calls for a suspension of the Constitution also suggest that...