BostonGlobe.com Political Headlines - January 4, 2013

• In Massachusetts delegation, a changing of the guard: Turnover has injected new blood into the delegation, but newcomers ­also bring a relative lack of experience, a sharp contrast to veterans who defined the delegation. Globe Washington bureau reporter Matt Viser covers.

• Warren joins Senate after long effort by some to keep her out of D.C.: When Elizabeth Warren was sworn in today as a US senator, it was the completion of a political turnabout started the previous May. Boston.com political editor Glen Johnson reports.

• An invigorated Menino back at City Hall: Back after a long hospitalization, Boston Mayor Thomas M. Menino spoke Thursday about his plans for the city and hinted at a run for reelection. Globe reporter Andrew Ryan explains.

• State politicians face 1.8 percent pay reduction:
  The 1.8 percent cut is an automatic reduction triggered by a dip in median household income over the past two years. Globe politics reporter Stephanie Ebbert details.