House Speaker Nancy Pelosi, D-Calif., seemed giddy Wednesday as she announced the impeachment managers who would go to the Senate and attempt to prosecute a case against President Trump. “He’s been impeached forever,” Pelosi said. “They can never erase that.” However, Pelosi has it exactly backward. The Senate is going to refuse to convict President Trump. He will be exonerated, and she and the Democrats will be condemned by history. The wide repudiation of the House Democratic betrayal of the Constitution is already beginning. As a historian myself, I think it’s important to document these reactions. Consider historian Victor Davis...