[3] He ran for the Ontario legislature in the 1975 provincial election, coming a close second to Progressive Conservative incumbent Art Evans in the riding of Simcoe Centre.
[4] He ran again in the 1977 provincial election, losing to the PC candidate George William Taylor by a greater margin.
[7] The NDP won a majority government in the 1990 provincial election, and Wessenger, running for a fourth time in Simcoe Centre, defeated incumbent Liberal Bruce Owen by almost 3,000 votes.
[8] He served as parliamentary assistant to the Attorney General from 1991 to 1995 and to the Minister of Health for the remainder of his time in office.
[10] The NDP were defeated in the 1995 provincial election, and Wessenger finished third against PC candidate Joe Tascona.