After months of staying neutral in the presidential primary, Rep. Elijah E. Cummings (D-Md.) endorsed Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE at a Baltimore rally on Sunday.

"I know Hillary Clinton. I knew her as first lady when she and her husband Bill Clinton William (Bill) Jefferson ClintonBarr says Ginsburg 'leaves a towering legacy' Trump reacts to Ginsburg's death: 'An amazing woman who led an amazing life' Jimmy Carter remembers Ruth Bader Ginsburg as 'a beacon of justice' MORE led our nation to peace and prosperity," he said, adding that she's always been an advocate for low-income children and families.

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With Cummings's endorsement, every Democratic member of Maryland's congressional delegation has backed Clinton, according to The Washington Post.

Cummings had stayed neutral in the race up to this point, mainly because of his role as a ranking Democrat in one of the House committees investigating the attacks in Benghazi, Libya, on Sept. 11, 2012, when Islamic militants stormed a U.S. diplomatic compound, killing four Americans.

His endorsement comes just weeks before the state's April 26 primary, where polls show Clinton leading rival Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE by 24 points, according to a RealClearPolitics average.