On the morning of Election Day, I joined He Haibo, a legal scholar at Tsinghua University in Beijing, as he spent several hours observing a polling station in the upscale Graham and Parks public elementary school in Cambridge, Massachusetts. “If I were a voter, I would vote for her just for this,” He said, pointing at Massachusetts State Representative Marjorie C. Decker, who was running unopposed for reelection, aiding a very old woman walk up the stairs.