Former Sen. Scott Brown (R-Mass.), who's running to be the junior senator from nearby New Hampshire, received an endorsement from current Sen. Kelly Ayotte (R-N.H.) on Tuesday.
Ayotte's endorsement comes weeks after she voted for a bipartisan energy efficiency bill spearheaded by Shaheen and Sen. Rob Portman (R-Ohio), despite a call from Brown, who opposed the bill.
Ayotte, along with former New Hampshire GOP Governors Craig Benson and Steve Merrill, endorsed Brown at a campaign event at Norton's Classic Cafe in Nashua, New Hampshire.
Lizzy Guyton, Brown's communications director, tweeted a picture of Ayotte making the endorsement:
Brown tweeted he was "honored" by the endorsement: