Another key statistic will be how many of the "late deciders" in Texas and Ohio break for Clinton. That will be key in shaping her decision about how negative to go. In other words, if the late deciders break for her, it will validate the campaign's decision in recent days to go after Barack hammer and tongs -- and guarantees we'll see more of the same over the next six weeks.
Pull up a chair, pop up the corn. This is going to be good.