Why not? Everybody else is doing it...
INDIANA: Clinton wins by 5 or less.
NORTH CAROLINA: Obama by at least 10.
That will increase his delegate lead by another half dozen or more while taking half the remaining delegates off the table. Hillary's math only gets worse.
UPDATE: I'm happy to be wrong if this is the result: Obama by a wider than predicted 15 in N.C. and a narrower than expected 2-point loss in Indiana. He gains 15 delegates and 200,000 in the popular vote at the end of the day.