Clinton has in fact fine tuned her campaign and is doing better in these later states than she was previously (though it is arguably too late to matter much), and more importantly, I think the pollsters are learning how to weight their samples in these contests, so their accuracy is improving.  Nevertheless, I'm not about to go out on a limb and predict anything except... uhm, a Democrat is going to win each contest.  :-/

Hows that for setting expectations?