State Senator Stanley C. Rosenberg, a veteran Democrat from Amherst, said today that he has the support of the “overwhelming majority” of his Democratic colleagues to become the next Senate president, succeeding Therese Murray.

“A succession plan is now in place for the Senate,” Rosenberg said in a brief interview in his office. “I have the overwhelming majority of Democratic caucus, which has signed up to support my efforts to succeed Senate President Murray.”

Rosenberg said he expects to take over from Murray, a Plymouth Democrat, in January 2015, when her term expires, although some State House observers believe Murray may step down before that. Senator Stephen Brewer, a Barre Democrat who is the Senate’s budget chief, was competing with Rosenberg for the post of Senate president.

Advertisement - Continue Reading Below

Rosenberg insisted there are no hard feelings between him and Brewer, however. “We’ve been friends for 35 years,” he said.

Rosenberg, 63, is considered a member of the Senate’s liberal wing. He was first elected to the House in 1986 and to the Senate in 1990. An openly gay legislator, he grew up in foster care in Revere and Malden and graduated from the University of Massachusetts at Amherst in 1977.