In 1998, Mulrooney won the general election with 2,418 votes (53.5%) against Republican nominee Douglas Salter to replace retiring Republican Jeffrey G. Mack.[3]
In 2000, Mulrooney won the general election with 5,127 votes (74.0%) against Republican nominee Michael Shaw.[4]
In 2002, Mulrooney was unopposed in the general election, winning 4,340 votes.[5]
In 2004, Mulrooney won his only challenge in the Democratic primary with 1,198 votes (79.3%),[6] and went on to win the general election with 6,590 votes (81.9%) against Republican nominee Phillip Simpkins.[7]
In 2006, Mulrooney won the general election with 4,619 votes (84.2%) against Republican nominee David Osborn.[8]
In 2008, Mulrooney won the general election with 6,981 votes (83.4%) in a rematch against Republican nominee David Osborn.[9]
In 2010, Mulrooney was unopposed in the general election, winning 5,108 votes.[10]
In 2012, Mulrooney won the general election with 7,297 votes (81.1%) against Republican nominee Laura Brown.[11]
In 2014, Mulrooney was unopposed in the general election, winning 3,860 votes.[12]
In 2016, Mulrooney was unopposed in the general election, winning 7,721 votes.[13]