Angela Alsobrooks Defeats David Trone in Maryland Democratic Senate Primary

Angela Alsobrooks, the Prince George’s County executive, won the Democratic primary for Maryland’s Senate seat on Tuesday, setting up a showdown with a popular Republican former governor that could determine control of the chamber.

The Associated Press called the race on Tuesday night for Ms. Alsobrooks, 53, over Representative David Trone, a wealthy congressman who spent more than $61 million of his own money on the race. Mr. Trone outspent Ms. Alsobrooks by a nearly 10-to-1 ratio, but Ms. Alsobrooks appeared on track to defeat him by double digits.

She is trying to become the first Black woman to represent Maryland in the Senate. The chamber now has just four Black members, three men and one woman, Senator Laphonza Butler, who has made it clear she will leave at the end of her term in January.

At her victory rally, Ms. Alsobrooks said that she had spoken with Mr. Trone by phone and that they had agreed to put their differences aside.

“We are united in our focus to keep the Senate blue, and I am grateful to have his support,” she said.

While Ms. Alsobrooks, a former prosecutor, trailed Mr. Trone early in the race, she was buoyed by widespread support among Maryland’s Democratic elected officials, who rallied around her campaign.