He represents the 17th Representative District, and had already filed for reelection. But he garnered a primary challenge from Melissa Minor Brown, who works as a registered nurse and a state-wide nursing educator for the Department of Corrections.
I have not yet seen a reason for Mulrooney’s retirement. The district he represents is safely Democratic. Here is the demographic information from Delaware First Map:
|Representative District Population||22445|
|OVER 18 WHITE||10505|
|OVER 18 BLACK||4852|
|OVER 18 HISPANIC||2169|