Glenn Ivey speaks at the 4th Congressional District candidates forum at Bowie State University, with former Maryland lieutenant governor Anthony Brown, seated left, and Republican Robert Broadus. (Mark Gail/For The Washington Post)

Two days before early voting begins, the Democratic candidates in Maryland’s 4th Congressional District are rolling out the biggest endorsements and fundraising numbers of the primary contest in hopes of drawing votes.

Former Prince George’s County state’s attorney Glenn F. Ivey unveiled a new radio advertisement on Tuesday featuring an endorsement from former U.S. attorney general Eric Holder, whom he worked for as a federal prosecutor in the early 1990s.

“Glenn Ivey is a proven leader with the experience it takes to make a real difference for Maryland families,” Holder says in the ad. “And that’s why we need him in Washington.”

Ivey has led the pack of six Democrats, including his closest competitors Del. Joseline Peña-Melnyk and former Maryland lieutenant governor Anthony G. Brown, in fundraising since the race began — after Rep. Donna F. Edwards (D-Md.) announced she would seek the seat left vacant by retiring Sen. Barbara Mikulski (D-Md.).

Ivey joined Brown and Peña-Melnyk this week in endorsing the four-term congresswoman in the Democratic Senate primary over House Rep. Chris Van Hollen (D-Md.), who is being backed by a slew of other Prince George’s County elected officials. The two candidates are locked in a statistical dead heat for the nomination.

Maryland state Del. Joseline Pena-Melnyk and former lieutenant governor Anthony Brown, center, talk with voters after the 4th Congressional District candidates forum at Bowie State University. (Mark Gail/For The Washington Post)

In the congressional race, Ivey has raised more than $1 million this election cycle and was the first to buy media ads. Peña-Melnyk, who also worked for Holder as an assistant U.S. attorney, pulled in more dollars for her best showing in the race during the first quarter of 2016.

Between January and April, the delegate’s campaign said it raised $287,000 in campaign contributions — a few thousand dollars more than Ivey did during the same period. In total, Peña-Melnyk has raised more than $797,000 for the election.

Brown and the other candidates have not yet released their fundraising totals.