Vote Marriage was founded started by former Members of Parliament Pat O'Brien (Liberal) and Grant Hill (Conservative) in 2005. It opposed same-sex marriage, and was officially non-partisan. There were 100 incumbents endorsed – 84 Conservative, 11 Liberal, 4 Bloc and 1 Independent.
Forty-seven of the forty-eight western and northern candidates endorsed by Vote Marriage Canada on 18 January 2006 were members of the Conservative Party. The other was independent Bev Desjarlais, formerly of the New Democratic Party.