McCague was a councillor in Alliston from 1960 to 1961, deputy
reeve from 1962 to 1964, reeve from 1965 to 1966, a public school board member from 1967 to 1968 and
Mayor from 1969 to 1973. He was chair of the Board of Governors for
Georgian College from 1967 to 1974 and
Simcoe County warden in 1966. He also served as chair of the
Niagara Escarpment Commission in the early 1970s. He was elected to the Ontario legislature in the
1975 provincial election, after defeating long serving Dufferin Simcoe MP Wally Downer for the Progressive Conservative nomination. He defeated
Liberal Bob Beattie by 1,691 votes in the riding of
Dufferin—Simcoe. He was elected by greater margins in the elections of
1977,
1981, and
1985. McCague served as
parliamentary assistant to the
Treasurer just before the 1977 election, and was brought into Bill Davis's cabinet on September 21, 1977, as
Minister of Government Services. On January 21, 1978, he was shifted to the
Ministry of the Environment. He was named
Chair of the Management Board of Cabinet on August 18, 1978. He retained this position until Davis resigned as Premier in 1985. McCague tried to convince Davis to remain in office for another election, but afterwards endorsed Frank Miller to succeed him as party leader. When Miller replaced Davis as Premier on February 8, 1985, he appointed McCague as
Minister of Transportation and Communications. Soon after this, the Tories were reduced to a tenuous
minority government in the 1985 election under Miller's leadership. McCague was retained in his portfolio after the election, but did little of significance before the government was defeated in the house. He sat in opposition for the remainder of his time in the legislature. McCague was narrowly re-elected in the
1987 election, defeating Liberal candidate Gary Johnson by only 306 votes in the redistributed constituency of
Simcoe West. He did not seek re-election in 1990. He returned to municipal politics, and served as mayor of
Tecumseth from 1992 to 1994. McCague is considered a mentor to his successor in the legislature, former cabinet minister
Jim Wilson. He continued to support the federal
Progressive Conservative Party over the
Reform Party in the 1990s. After leaving provincial politics, McCague served as the mayor of the newly amalgamated town of
New Tecumseth from 1992 to 1994. Shortly after
Mike Harris returned the Progressive Conservatives to government in 1995, McCague was appointed as a government negotiator in talks with the Ontario Medical Association. He was a founding member, and first chair, of the Board Governors of Georgian College, in Barrie.
Cabinet positions ==References==