A video posted to Donald Trump's account on his social media network Monday included references to a "unified reich" among hypothetical news headlines depicting an election win by him in November. The headline appears among messages flashing across the screen such as "Trump wins!!" and "Economy booms!" Other headlines appear to be references to World War I. The word "reich" is often largely associated with Nazi Germany's Third Reich, though the references in the video Trump shared appear to be a reference to the formation of the modern pan-German nation, unifying smaller states into a single reich, or empire, in...