Angela Alsobrooks met the moment at the DNC. Now comes the hard part.

Dressed in suffragette white, Angela D. Alsobrooks strode off the Democratic National Convention stage this week after the most important speech of her political career — straight into a bear hug from Rep. Steny H. Hoyer, her longtime mentor and a Maryland political legend. Before a national audience, Alsobrooks had firmly established her ties to Vice President Kamala Harris — another mentor — and she leaves the convention with fresh momentum in a tight Senate race against former governor Larry Hogan that could determine which party controls the agenda.