General Mark Milley, the chairman of the Joint Chiefs of Staff, likened Donald Trump’s effort to hold on to power after the 2020 election to Adolf Hitler, saying the president was preaching “the gospel of the Führer” with his lies about the election being stolen, according to a new book by two Washington Post reporters. Milley was disturbed by the sight of Trump supporters rallying to his cause in November, calling them “Brownshirts in the streets.” Leonnig and Rucker wrote that Milley “believed Trump was stoking unrest, possibly in hopes of an excuse to invoke the Insurrection Act and call...