stephen harper loss
The Conservatives were demoted to Opposition ranks following a Liberal majority win in last Monday's general election.
Other names that are circulating include MPs Kellie Leitch, Tony Clement and Lisa Raitt, B.C Premier Christy Clark and Saskatchewan Premier Brad Wall.
Harper will resign as leader, but stay on as an MP.
The federal government has become less active in the daily lives of Canadians, with direct benefits replacing big government programs, for instance.