If Hillary wins PA, this thing could last until June

Although Barack Obama is closing fast in the polls, Hillary Clinton still leads in Pennsylvania.  From the very beginning, she was expected to win there.  She would then have to win either North Carolina or Indiana, who both vote on May 6th.  If she lost both, she would be out.  And then there's Kentucky and Oregon.  At the moment, Obama leads in North Carolina and she leads in Indiana.  They will probably split those two races.  Oregon will go to Obama rather easily.  In Kentucky, Obama is way behind.

In other words, the two will keep splitting race after race, leaving this thing up in the air until June.