“Corporate-financed political speech in coordination with a political campaign remains legally out of bounds. All the same, I wish to stand up for the right of foreigners to take to America’s street corners, printing presses, and airwaves with political messages, whether as individuals or as legally incorporated groups. The United States is no hermit kingdom. If America decides it is going to invade a place, impose sanctions, or otherwise meddle in another country’s business—and it has been known to do such things—it only seems fair to hear what others around the world think about it.”