Maryland state Del. Aruna Miller (D-Montgomery) is a candidate for the congressional seat soon to be vacated by Rep. John Delaney (D-Md.). (Miller campaign)

The only woman running to replace Rep. John Delaney (D-Md.) has won the backing of Emily’s List, an advocacy group that supports women running for office who are in favor of abortion rights.

Del. Aruna Miller (Montgomery) is one of five Democrats who have announced plans to seek the 2018 nomination. Delaney said last month that he will not seek reelection and instead will run for the Democratic presidential nomination in 2020.

Miller, an engineer by training who lives in Darnestown, immigrated to the United States from India as a child. A delegate since 2011, she has pushed for bills requiring electronic monitoring of domestic violence perpetrators and extending the statute of limitations for sexual offenses against minors.

“She will be a strong voice for women and families in Maryland’s 6th District, pushing back against Donald Trump and Paul Ryan as they attempt to end health care coverage for millions, defund Planned Parenthood, and roll back critical environmental protections,” Emily Cain, executive director of Emily’s List, said in a statement.

Maryland’s congressional delegation has been all male since the retirement of longtime senator Barbara A. Mikulski (D) and the departure of congresswoman Donna F. Edwards (D) last year. There are currently seven Democrats and one Republican.

The support of Emily’s List could help Miller compete against wine magnate David J. Trone, who spent more than $13 million of his own money running unsuccessfully for a different seat in Congress last year.

State Sen. Roger Manno (Montgomery), state House Majority Leader C. William Frick (Montgomery), and retired intelligence officer Andrew Duck — who twice ran for the seat years ago, when it was firmly in Republican hands — also are seeking the Democratic nomination.

Among Democrats, only Miller and Duck live in the district, which candidates are not required to do to run.