Democratic Party hopefuls Rep. Donna Edwards, and Congressman Chris Van Hollen, both of Maryland, have agreed to four debates ahead of the April primary for the nomination to U.S. Senate and succeed retiring Sen. Barbara Mikulski (D-Md.) (TWP/TWP)

The Democratic candidates vying to succeed retiring U.S. Sen. Barbara Mikulski (D-Md.) announced Friday that they have agreed to four debates to be broadcast on television and radio in the weeks before the April primary.

U.S. Reps. Donna F. Edwards and her House colleague Rep. Chris Van Hollen are competing for the Democratic nomination to fill Mikulski’s seat.

They have sparred from afar, attacking each other on various policy stances, and appeared together at a National Organization for Women forum in May.

In October, Edwards challenged Van Hollen to six debates. The campaigns ultimately developed a plan for four debates, two of which will be scheduled later. They announced details of two debates on Friday in addition to two upcoming candidate forums:

■March 18: A debate at noon on WAMU “The Kojo Nnamdi Show”: The Politics Hour Radio;

■March 18: A forum at the Eleanor and Franklin Roosevelt Democratic Club

■March 25: a televised debate sponsored by the University of Baltimore, League of Women Voters, The Baltimore Sun and WJZ-TV;

■April 5: a forum sponsored by the NARFE Maryland Federation, the Business and Professional Women’s Association Forum