I just wanted to say a little about the two states that are having primaries today -- Kentucky and Oregon. There are no reliable polls done on the Democratic presidential race in these two states, but the pundits seem to think Sanders will win both. That may be true, but I expect it will probably be pretty close in both states -- and the two candidates will split the available delegates. That will just move Clinton closer to the 2,383 delegates needed for the nomination.
Bernie's supporters like to talk about a "contested" convention. That's just a sad dream. Bernie can continue his campaign if he wants, but Clinton will become the nominee on the first ballot (and she will have several hundred more delegates than needed).