[cnn-photo-caption image= http://i.l.cnn.net/cnn/2008/images/02/01/art.cellucci.ap.jpg caption="Cellucci has long been a critic of McCain rival Mitt Romney."](CNN) - Republican presidential hopeful John McCain will claim the backing of one former Massachusetts governor Saturday in his quest to beat another.
Former Gov. Paul Cellucci will back the Arizona senator one day ahead of McCain’s visit to Mitt Romney’s home turf of Boston, according to McCain campaign adviser Steve Schmidt.
Cellucci had previously backed former Rudy Giuliani’s presidential bid. The former New York City mayor ended his White House bid and endorsed McCain earlier this week.
Massachusetts voters head to the polls on Super Tuesday, February 5.