Sen. Brian E. Frosh, left, speaks with Sen. Joan Carter Conway during a special legislative session in 2011. (AP Photo/Patrick Semansky)

Sen. Brian E. Frosh (D-Montgomery) on Saturday picked up an endorsement of his bid to become Maryland’s attorney general from the state’s largest teachers lobby.

The Maryland State Education Association said 86 percent of delegates from its representative assembly voted Saturday to support Frosh, who faces Dels. Jon S. Cardin (D-Baltimore County) and Aisha N. Braveboy (D-Prince George’s) in the June Democratic primary for attorney general.

“We need a strong attorney general who will fight for Marylanders, social justice and our public schools,” Betty Weller, the organization’s president, said in a statement announcing its backing of Frosh to succeed Attorney General Douglas F. Gansler (D), who is running for governor.

Frosh, the chairman of the Senate Judicial Proceedings Committee, has picked up more endorsements from interest groups and fellow Democratic officials than his opponents, and he has also raised more money.

But recent polls, including one last month by The Washington Post, have showed Cardin with a modest lead in a Democratic primary in which many voters have yet to pay close attention.

The teachers group on Saturday also announced its endorsement of Comptroller Peter Franchot (D) for reelection this year.

In October, the group endorsed Lt. Gov. Anthony G. Brown (D) for governor.