This is a list of Canadian politicians who have crossed the floor, in that they have changed party affiliation while in office. These are Members of Parliament (MPs) unless otherwise noted. MPPs are Members of Provincial Parliament of Ontario MNAs are Members of the National Assembly of Quebec MHAs are Members of the House of Assembly of Newfoundland and Labrador MLAs are Members of the Legislative Assembly of other provinces Pre-confederation 1866: Andrew Rainsford Wetmore, Anti-Confederate in the New Brunswick colonial legislature, joins the Confederation Party after failing to win a desired cabinet post. 1860s September 1, 1868: Stewart Campbell, formerly an Anti-Confederate MP, becomes a Liberal-Conservative member. January 30, 1869: The Anti-Confederate Party, which opposed Nova Scotia joining Confederation, collapses. Members scatter among different parties: Conservative: Alfred William Savary Liberal-Conservative: Archibald McLelan, James Charles McKeagney, Hugh McDonald, Edmund Mortimer McDonald, Joseph Howe, Thomas Coffin and Hugh Cameron Liberal: James William Carmichael, William Henry Chipman, James Fraser Forbes, William Ross, William Hallett Ray, Patrick Power, Independent: Alfred Gilpin Jones October 9, 1869: Richard John Cartwright, formerly a Liberal-Conservative MP, he became a Liberal MP after being denied a position in the cabinet. 1870s 1873: Newton LeGayet MacKay leaves the Conservatives for the Liberals. 1874: Samuel McDonnell leaves the Conservatives for the Liberals. 1879: Five Quebec MLAs leave the Quebec Liberals for the Conservatives, causing the government to fall: Alexandre Chauveau Edmund James Flynn Louis Napoléon Fortin Étienne-Théodore Pâquet Ernest Racicot 1880s 1887: Guillaume Amyot leaves the Conservative caucus to sit as a Nationalist. He later changes his designation to Nationalist Conservative. 1910s 1911: Louis-Joseph Papineau, Liberal MP since 1908, re-elected as a Conservative in 1911. As a result of the Conscription Crisis of 1917, Conservative Prime Minister Sir Robert Borden forms a Union Government in an attempt to win support across party lines. Opposition leader Sir Wilfrid Laurier refuses to support the new government but many of his MPs cross the floor to support the new government either as Unionist or Liberal-Unionist candidates in the Canadian federal election of 1917. Those loyal to Laurier run as Laurier-Liberals. Conversely, a number of Quebec Conservative MPs abandon Borden over the conscription issue and join the Liberals. 1917: Louis-Joseph Papineau, leaves the Conservatives to run as a Laurier-Liberal as a result of the Conscription Crisis. 1917: Robert Lorne Richardson, elected in the 1911 election as a Liberal (but previously sitting as variously a