Claim: Manning Doherty (September 27, 1875 - September 26, 1938), who used to support the Conservative Party, became a leader of the Progressives in Opposition.
Evidence: Manning William Doherty (September 27, 1875 - September 26, 1938) was a farmer, businessman and politician serving as Ontario's Minister of Agriculture during the United Farmers of Ontario-Labour government of 1919 to 1923 and as leader of the Progressives (as the UFO had become known) in Opposition before leaving provincial politics. He was a supporter of the Conservative Party initially before being attracted to the agrarian movement and the fledgling United Farmers. 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. 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.