“I have decided to run for the US Senate ­because this fight is too important,” Markey said in a statement to the Globe. “There is so much at stake.” Two other Bay State congressmen, Michael E. Capuano of Somerville and Stephen F. Lynch of South Boston, both Democrats, have also expressed interest in seeking Kerry’s seat, but have announced no decision. [Boston Globe]

THE FIGHT for John Kerry’s Senate seat is on.