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Thatcher, Saskatchewan Liberal MLA for Thunder Creek and son of former Premier Ross Thatcher, defected to the PCs over dissatisfaction with the provincial Liberal party's direction.
Thatcher became Minister of Energy and Mines under PC Premier Grant Devine. He was later convicted of first-degree murder of his ex-wife in 1984.
Crossing the Floor. (1977). Colin Thatcher: Liberal to Progressive Conservative (1977). Retrieved 2026-04-11, from https://crossingthefloor.ca/crossings/colin-thatcher-1977
Liberal → Progressive Conservative
Same party switch