In the subsequent 19th Canadian Parliament, Blackmore acted as leader of the elected New Democracy MPs, all Social Crediters.

At such meetings, men debated whether Mormon leaders were wrong to have renounced Joseph Smith's revelation regarding polygamy.

His nephew, Winston Blackmore, is the leader of Canada's largest polygamist group and was charged by the Royal Canadian Mounted Police with polygamy in 2009.

[4] Blackmore was criticized for his views on Jews, and the Encyclopaedia Judaica said he "frequently gave public aid and comfort to anti-Semitism.

[6] However, in a speech he made in the House of Commons on January 31, 1944 (see Hansard records) he advocated for the establishment of “a national homeland for the Jews” in Palestine.