Prince George’s County Executive Rushern L. Baker III and state’s attorney Angela Alsobrooks plan to endorse Maryland Sen. Brian Frosh (D-Montgomery County) on Wednesday in his bid to become the state’s next attorney general.

Frosh is competing in the June 24 primary against Del. Aisha N. Braveboy (D-Prince George’s) and Del. Jon S. Cardin (D-Baltimore). The winner will face off in November against Republican Jeffrey N. Pritzker and Libertarian Leo Wayne Dymowski to succeed Attorney General Doug F. Gansler (D), who is running for governor.

Baker and Alsobrooks, both Democrats, will announce their support for Frosh at a news conference in Lanham, aides said. Both Baker and Alsobrooks said they regard Braveboy, a county resident, as a friend, but decided to back Frosh based on their experiences working with him.

“It was a tough choice but it’s important to recommend a person to the public who has an impressive body of work,” Alsobrooks said. “His record wrote the endorsement.”

Baker, a former state delegate, said Frosh would be a strong advocate for Prince George’s County on issues like foreclosures, crime prevention and environmental justice. “Among the field, he has the experience to do the things we need in Annapolis,” Baker said. “This is the statewide candidate I’m going to work the hardest for.”

Alsobrooks said she never forgot a meeting she had with Frosh in 2013 after he didn't support legislation that would add time to an offender’s sentence if a crime was committed in the presence of a child. She said she was upset at first, but was surprised by Frosh’s response. Frosh “told me his conscience would not let him be part of legislation” because he was sensitive to the disproportionate number of black men being sent to prison, Alsobrooks said. “That was the crystallizing moment for me.”

In a Washington Post poll in February, both Frosh and Braveboy trailed behind Cardin, the nephew of U.S. Sen. Benjamin L. Cardin (D). Braveboy recently received endorsements from a building trades group and the United Food and Commercial Workers union.