Game over! This was a rout, America. Winning seven states and the vast majority of delegates is a landslide. Donald Trump and the millions of his supporters have changed American politics and the Republican Party for the foreseeable future. The nomination is within his grasp and if he does what he said he would do Tuesday night: "[I will] be a unifier!" he may be a very viable candidate against Hillary Clinton in the fall. After his victories Tuesday night in multiple states and his second place finish in others , Trump is in an unstoppable position. Whether the junior...