Angela Alsobrooks, the Prince George’s County Executive, won in the Democratic primary for U.S. Senate in Maryland on Tuesday night. Her win sets the stage for a high-stakes general election contest against Republican former governor Larry Hogan that could decide control of the closely divided Senate.

The Associated Press called the race for Alsobrooks, 53, over wealthy congressman David Trone, who spent over $61 million of his own fortune but appeared headed for a double-digit loss despite vastly outspending Alsobrooks.

If elected in November, Alsobrooks would become the first Black woman to represent Maryland in the Senate. The current Senate has just three Black male members and one Black female senator.

At her victory rally, Alsobrooks said she had spoken with Trone and they agreed to unite behind the Democratic nominee. “We are focused on keeping the Senate blue, and I’m grateful for his support,” she stated.

While trailing Trone early, the former prosecutor gained momentum with endorsements from most of Maryland’s Democratic elected officials. Her uphill primary battle now gives way to a general election fight against Hogan, who was recruited by Republican leader Mitch McConnell to run as the GOP tries retaking Senate control.

Democrats currently hold a 51-49 Senate majority, but are projected to lose a seat in West Virginia, making the Maryland race critical for maintaining their razor-thin edge. Alsobrooks and Hogan are vying to replace retiring long-time Democratic Sen. Ben Cardin.

“The fight won’t be easy,” Alsobrooks told supporters, including Gov. Wes Moore. “Maryland has been blue, but only if we work for it.”

Hogan welcomed his general election opponent, saying: “I value our relationship, and look forward to debating who can fix Washington’s mess.”