UFO He was a supporter of the
Conservative Party initially before being attracted to the agrarian movement and the fledgling
United Farmers. He became vice-president of the United Farmers of Ontario and director of the
United Farmers Co-operative Company. Shortly after the
1919 provincial election in which the UFO won an upset victory Manning was appointed agriculture minister in the government of
E.C. Drury and entered the Ontario legislature by means of a
by-election. As Agriculture Minister, Doherty encouraged
co-operative marketing for agricultural products serving until the government's defeat in the
1923 provincial election. Doherty was personally re-elected to the legislature in his riding of
Kent East.
Progressives Doherty served as acting leader of the Progressives through the 1924 legislative session but announced at the beginning of this tenure that he would not be seeking the leadership permanently. Doherty remained leader until January 1925 when the Progressive caucus chose
William Raney as its leader after Doherty refused to reconsider his retirement. Despite the fact that the UFO/Progressives were the second largest party in the
Ontario legislature following the
1923 provincial election, Doherty did not become
Leader of the Opposition since Conservative Premier
Howard Ferguson used an announcement from UFO general secretary
James J. Morrison was withdrawing from party politics as a pretext to recognise the third place
Liberals as the official opposition, despite Doherty's protests. The parliamentary wing of the UFO and its non-parliamentary wing had been at loggerheads throughout the party's time in government and Morrison's statement was issued without consulting UFO members of the legislature, who subsequently became officially known as the Progressive group due in part to the dispute with Morrison's wing of the UFO.
Conservatives Doherty resigned his seat in the provincial legislature in 1926 in order to campaign in support of the federal Conservatives led by
Arthur Meighen. He considered running as a
federal Conservative candidate against former Liberal Labour minister
John Campbell Elliott in
Middlesex West win the
1926 federal election but, in the end, did not run. ==After politics==