BostonGlobe.com Political Headlines - December 28, 2012

• Rep. Markey to run for Kerry's seat: US Representative Edward Markey, the first major candidate in the likely race, could face recently defeated Senator Scott Brown. Globe reporter Mark Arsenault covers.

•  Brief delay built into fiscal cliff tax hikes: IRS gives added time; Washington engaged in yet another day of blame and bluster with no visible signs of progress. Globe Washington bureau chief Christopher Rowland reports.

• Menino marks his 70th back at City Hall: Mayor Thomas M. Menino celebrated his 70th birthday with a return to his City Hall office for the first time since he fell ill in mid-October. Globe correspondent Jeremy C. Fox elaborates.