From the New York Times, on the day of the February 5 primaries, right after Ted Kennedy’s endorsement:

If Mr. Obama wins Massachusetts, that will be testimony to the power of Senator Edward M. Kennedy, and a real sting for Mrs. Clinton, who once thought she had a comfortable lead there. If Mr. Obama comes close in New York, or in neighboring New Jersey, watch for a tough round of questions about Mrs. Clinton’s electability.

Clinton routed Obama in Massachusetts, New York, and New Jersey.