Another Conservative MP Crosses Floor to Join Liberal Caucus

The Liberals are now one seat shy of a majority in the House of Commons.

Prime Minister Mark Carney raises the hand of Markham-Unionville MP Michael Ma, who crossed the floor from the Conservatives to the Liberals hours earlier, at the Liberal caucus holiday party in Ottawa, on Dec. 11, 2025. The Canadian Press/Justin Tang

Toronto-area MP Michael Ma has left the Conservative caucus to join the governing Liberals, the second former Tory lawmaker to do so in just over a month.

Ma, the MP representing Markham—Unionville, said in a statement on Dec. 11 that he made the decision after reflecting with his family and those in his riding “on the direction of our country.”