WASHINGTON — Mitt Romney, having met last weekend in New Hampshire with the staff of his 2008 presidential campaign, is preparing to embark on an aggressive schedule that will take him to more than 25 states in what is seen as a prelude to another possible White House bid. The two-month itinerary will launch a cycle of politicking for Republican midterm election candidates that will make Romney one of the nation’s most visible politicians in a year when he is not on the ballot.
