On Saturday evening, presidential frontrunner Joe Biden -- who doesn't actually become president-elect until vote counts are certified -- gave a preliminary victory address. In that address, he spoke of his mandate to govern: a mandate, he said, that extended to marshalling the "forces of decency ... fairness ... science ... hope." Which is a pretty vague mandate, as it turns out. But there was another overarching mandate Biden expressed: a mandate to come together, to unify as Americans. "To make progress, we must stop treating our opponents as our enemy," Biden said. "We are not enemies. We are Americans."...