Mrs. Sullivan said, "the people of New Hampshire deserve an explanation" about Mr. Obama's changing positions, and she disagreed the new push was going negative.
'Elect a doer, not a talker,' Hillary urges →
But former Democratic Party Chairwoman Kathy Sullivan said a number of people, including Ms. Hassan, may jump in.
N.H. Gov. Lynch won't seek 5th term in 2012 →