AP source: NH Sen. Ayotte to endorse Romney

By STEVE PEOPLES | November 19, 2011 | 10:10 PM EST

PETERBOROUGH, N.H. (AP) — Republican presidential contender Mitt Romney is set to win the endorsement of New Hampshire Sen. Kelly Ayotte.

An official with knowledge of the endorsement plan says Ayotte will make her endorsement official in a campaign appearance with Romney on Sunday.

The official spoke on condition of anonymity ahead of the announcement.

The endorsement will represent a major pickup for Romney, who's already leading polls in the early primary state.

The 43-year-old Ayotte will become the first member of the New Hampshire congressional delegation to endorse a presidential contender.