Prince George’s County State’s Attorney Angela Alsobrooks officially announced her candidacy for Prince George’s County executive in a speech in Camp Springs, Md., in July. (Arelis Hernandez/TWP)

Another union that previously supported Donna F. Edwards is throwing its support behind one of her Democratic primary rivals, State’s Attorney Angela Alsobrooks, in the race for Prince George’s County executive.

The Lanham, Md.-based chapter of the International Brotherhood of Electrical Workers union, which represents more than 8,000 electrical workers in Maryland, Virginia and the District, said it is backing Alsobrooks because of her focus on jobs and business development. IBEW Local 26 endorsed Edwards, a former congresswoman, in her bid for U.S. Senate, and its union hall was the site of her fiery concession speech in 2016.

But the union said Thursday that Alsobrooks is the candidate who “shares our same vision for Prince George’s County,” citing her support of “job growth via business and commercial projects to bring more corporate tax dollars to the county.”

“This is a real vote of confidence in my leadership to carry the county into the next phase of growth,” said Alsobrooks, who added her “broad and growing” support includes those who have previously supported her opponents.

Service Employees International Union 1199, a labor union with 10,000 local members that helped propel Edwards to Congress, announced last year that it would also back Alsobrooks in the race to succeed County Executive Rushern L. Baker III (D), who is term-limited and running for governor.

Alsobrooks and Edwards will face state Sen. C. Anthony Muse (D-Prince George’s), former Obama administration official Paul Monteiro and Lewis S. Johnson, a political neophyte, in the June 26 primary. In the heavily Democratic county, winning the primary is tantamount to winning the general election.

Edwards, who was persuaded to run by progressive activists, has also received considerable labor support, including endorsements last year from four local unions representing thousands of Prince George’s County hotel, food, retail and public-sector workers.

She has also won the support of CASA in Action, the political arm of the immigrant advocacy organization, Progressive Maryland and a different, also influential SEIU chapter, 32BJ.

Rahsheim Wright, Edwards’s campaign manager, said she has “delivered for men and women in the trades for more than 30 years” and would focus on their agenda, not that of developers, if elected.