"The whole world is a stage," sang a soul group in the 1960s, paraphrasing Shakespeare. "And everybody's playing a part."

Both casual and committed watchers of the impeachment process can be forgiven if they believe that is exactly what is playing out in the nation's capital right now. It sometimes seems we are watching an elaborate set-piece, every actor saying his or her scripted lines, the end of the story predetermined. Then we will have a presidential election.