Prince George’s County State’s Attorney Angela Alsobrooks speaks at a news conference in 2016 in Upper Marlboro, Md. Looking on are Prince George’s County Executive Rushern L. Baker III, left, and Prince George’s County Board of Education Chairman Segun C. Eubanks. (Mark Gail for The Washington Post)

Prince George’s County State’s Attorney Angela Alsobrooks (D) officially launched her campaign for county executive Monday with a celebration at her parents’ home that she said was a metaphor for the county as a whole.

“This is our house,” Alsobrooks exclaimed as she shot both arms into the air. “For too long our focus has been on the potential of the county, it is not enough. … It is time for us to realize the dream. It is time for us to fulfill the promise.”

Alsobrooks, 46, will face the only other declared candidate, state Sen. C. Anthony Muse (D-Prince George’s) in June in the primary, but she has been building a coalition of support for years in preparation for the contest.

More than 100 people crowded onto the tree-lined street in Camp Springs, where Alsobrooks grew up, for what looked a lot like a summer block party. Music was playing, volunteers wearing neon green Alsobrooks campaign shirts handed out water and snacks, and the guests chatted buoyantly in anticipation of a race that has been a long time coming.

“She’s genuine,” said Paul Iglesia, a neighbor of Alsobrooks who joined the scrum of news photographers to get his own shot of the candidate. He recalled seeing the exhausted prosecutor late one night with her arms full of books. He expected her to make a beeline for the house when he motioned to greet her, but instead Alsbrooks came over to talk.

Alsobrooks’s father, James Alsobrooks, a retired newspaper distributor for The Washington Post, charmed the crowd with stories of his “Angie,” her childhood, academic achievements and her family’s confidence that she would reach every goal she set for herself.

“It’s simply Angela’s time,” echoed John Word, Alsobrooks’s former student government adviser in high school, who recalled her first race for elected office. Her presence and speeches catapulted the budding politician to the top of the heap, Word said: “She’s a tough cookie and she’ll fight for Prince George’s County.”

After the introductions, Alsobrooks made her way to the lectern and said her government’s success will stand on three pillars: “safe communities, a strong and vibrant commercial tax base and quality education.”

But the loudest cheers erupted when the candidate promised to restore twice-a-week trash pickup, reversing a cost-saving measure executed by County Executive Rushern L. Baker III (D) more than a year ago.

“The American Dream, I promise you this, will be shared by all of us,” Alsobrooks said. “The table of opportunity will have a seat for you.”