New York Times:

When paired with Mr. Obama’s comfortable victory in North Carolina, a bigger state, Mrs. Clinton’s performance in Indiana did not seem to be enough to cut into Mr. Obama’s lead in pledged delegates or in his overall lead in the popular vote. And because Mrs. Clinton did not appear to come particularly close in North Carolina, despite a substantial effort there, she lost an opportunity to sow new doubts among Democratic leaders about Mr. Obama’s general-election appeal.