The Liberal Party under William Lyon Mackenzie King tried to deal with this situation by co-opting the Progressives, offering to form a coalition with them.
But by 1926, the party had split and some Progressives decided to support the Liberals, running as Liberal-Progressive or Liberal-Labour-Progressives, or similar variations.
An eighth Manitoba Liberal-Progressive, Robert Forke, who was the group's leader, was acclaimed in a by-election later in the year and was appointed to the Cabinet.
"National Liberal Progressive" was a political label used in the federal election of 1940, by W. Garfield Case, in Grey North electoral district in Ontario.
McNaughton, Case ran and won the 5 February 1945 by-election as the candidate of the Progressive Conservative Party of Canada.
William Gilbert Weir was the longest-lasting Liberal-Progressive MP, winning his first election in the riding of Macdonald in Manitoba in 1930.
Weir served as Chief Government Whip from 1945 to 1953 and parliamentary assistant to Prime Minister Louis St. Laurent from 1953 to 1957.
In Ontario, an electoral coalition was formed in 1934 between the provincial Liberals under Mitchell Hepburn, and the Progressive bloc of Members of the Legislative Assembly (MLAs) under Harry Nixon.
By the end of its term in 1923, the party had changed its name to the Progressives and after the 1926 election, Nixon was the sole former member of the Drury cabinet left in the Legislature.
Even before 1934, several candidates ran and were elected under the Liberal-Progressive banner: It was only in the 1934 election that a formal alliance between the Progressives and Liberals began, returning four Liberal-Progressive MLAs (Nixon, Douglas Campbell of Kent East, Roland Patterson of Grey North and James Francis Kelly of Muskoka).
Liberal-Progressive leader Harry Nixon was provincial secretary in Liberal Premier Mitchell Hepburn's cabinet from its inception in 1934.
While he never sat as a Liberal-Progressive, Farquhar Oliver was first elected as a UFO MLA in 1926 and sat informally with the Liberal caucus beginning in 1934, when Hepburn formed government, while remaining a UFO MLA until 1941 when he officially joined the Liberals and was appointed to cabinet as minister of public works.