The Republican National Convention opens in Cleveland — we are all witnesses — in exactly 16 days. That means that sometime over the next two weeks or so, we'll find out whom Trump has picked to be his vice-presidential running mate. Trump and his team have said all sorts of things about the timing of the announcement, including sometime soon and in the midst of the convention. Either way, it's coming. And coming soon. Trying to figure out a) whom Trump will pick or b) whom he is consulting in deciding whom to pick is, well, tough. But we do...