Sarah Elfreth credits constituent work for primary win in 3rd Congressional District, will face Rob Steinberger in November

After being declared the winner in the Democratic primary for Maryland’s 3rd Congressional District, state Sen. Sarah Elfreth thought about all the work that brought her to this moment — on the campaign trail and in the state Senate.

People said “they were voting for me because of the way I’ve represented my Senate district and that’s what they’re looking for in someone representing their congressional district,” Elfreth said Wednesday. “I was really blown away by that.”

Elfreth...