2003 • December 5 – The Canadian Alliance votes with a 96% majority in favour of merging with the Progressive Conservative Party of Canada. • December 6 – The Progressive Conservative Party votes, with 90% of delegates in favour of merging with the
Canadian Alliance. • December 8 – The Conservative Party of Canada is officially registered with
Elections Canada. The party's first
interim leader is
Senator John Lynch-Staunton, with a formal leadership race scheduled for March 2004. • December 10 –
Scott Brison, Progressive Conservative MP, crosses the floor, and sits with the
Liberal Party of Canada. Brison is the fourth PC MP, out of an original caucus of 15, to decide not to sit with the new
Conservative Party of Canada. • December 30 –
Bernard Lord,
Premier of
New Brunswick, reconfirms that he will not seek the leadership of the Conservative Party. He had been considered a potential frontrunner.
2004 • January 12 –
Stephen Harper announces his entry into the race to lead the new
Conservative Party of Canada. Earlier that day,
Jim Prentice drops out of the leadership contest, citing a lack of funds. • January 13 –
Peter MacKay declares he will not enter the race to lead the new
Conservative Party of Canada. • January 15 – Auto parts magnate
Belinda Stronach and former
Ontario Health Minister
Tony Clement both announce their intention to run for leadership of the
Conservative Party. • January 16 – Fraser Valley MP
Chuck Strahl announces he will not seek the Conservative leadership, citing financial barriers. • January 20 –
Belinda Stronach formally announces the launch of her campaign to seek the Conservative leadership. She rounds out the field at three; no other serious contenders are now seen as planning an entry. • March 19 – The
leadership convention opens in
Toronto; the candidates give opening speeches. • March 20 – Stephen Harper wins on the first ballot with 56% of points, under the party's weighted voting system. • March 22 – Harper names former PC leader
Peter MacKay the deputy leader of the Conservative party. ==Breakdown by province==