A good rule of thumb in politics is that voters go where the action is. Contested primaries will generate far more interest than those where there is no race. This is especially true in states like Wisconsin, which have “open” primaries, where any voter can choose where they’ll cast their vote. With a contentious primary fueled by millions of dollars in spending, it was widely expected that turnout in yesterday’s Democrat primary in Wisconsin would easily trump the GOP turnout. It didn’t happen that way.