As I watched Speaker Nancy Pelosi surround herself with large American flags and wrap her impeachment putsch in the language of the Founders, a Mark Twain line came to mind. “Don’t try and teach a pig to sing,” he warned. “It’s a waste of your time, and it annoys the pig.” Yet that’s exactly what Pelosi is doing. No matter how she dresses it up, her impeachment is a pig. Does Pelosi hate Donald Trump? Of course she does. She hates that he’s president, that he’s building an economy that is the envy of the world and that he appeals...