Editing Peter MacKay (section)

===Conservative party merger===
Public musings that the divided PCs would be marginalized in a future election between a relatively stable western-based CA under Stephen Harper and the massively popular Paul Martin Liberals (although [[Jean Chrétien]] remained the Liberal leader until November 2003, he had announced he would not run again), MacKay encouraged talks between high-profile members of the Canadian Alliance and the Progressive Conservatives.

On October 15, 2003, the merger talks culminated in MacKay and Alliance leader Stephen Harper signing an Agreement in Principle on the establishment of the Conservative Party of Canada, whereby the Progressive Conservatives and the Canadian Alliance would merge to form a new [[Conservative Party of Canada]]. While MacKay was roundly criticized in some [[Red Tory]] circles for permitting a union under his watch, MacKay's efforts to sell the merger to the PC membership were successful: 90.4% of the party's elected delegates supported the deal in a vote on December 6, 2003. {{Citation needed|date=May 2011}}

Some PC caucus members refused to accept the merger: long-time MP and former [[Prime Minister of Canada|Prime Minister]] [[Joe Clark]] continued to sit as a "Progressive Conservative" for the remainder of the Parliament, as did MPs [[John Herron (New Brunswick politician)|John Herron]] and [[André Bachand (Progressive Conservative MP)|André Bachand]], while [[Scott Brison]] left the new party to join the [[Liberal Party of Canada|Liberal Party]] in December 2003. In January 2004, several Senators left the party to sit as independents or "Progressive Conservatives". MacKay announced on January 13, 2004, that he would not run for the leadership of the new Conservative Party. On March 22, he was named deputy leader of the new party by newly elected leader Stephen Harper. He was easily re-elected in the [[2004 Canadian federal election|June 28, 2004 federal election]] in the newly redistributed riding of [[Central Nova]].<ref>{{Cite news |url=https://www.newspapers.com/article/waterloo-region-record-mackay-easily-hol/150125105/ |title=MacKay easily holds on to seat in Nova Scotia |newspaper=[[Waterloo Region Record]] |place=New Glasgow, Nova Scotia |agency=Canadian Press |page=5 |date=2004-06-29 |access-date=2024-06-26 |via=Newspapers.com}}</ref>
[[File:Petermackaytobeswornin2006.JPG|thumb|upright|left|MacKay arrives at [[Rideau Hall]] for the swearing in of the new government after the [[2006 Canadian federal election|2006 Canadian election]]]]
On September 29, 2005, the [[Premier of Nova Scotia]], [[John Hamm]], announced his intention to resign. There was speculation that MacKay would return to the province to pursue provincial politics and enter the [[Progressive Conservative Association of Nova Scotia]] [[2006 Progressive Conservative Association of Nova Scotia leadership election|leadership race]] to become the Premier. MacKay would have been considered a front-runner in the race; however, he decided to remain with the Federal Conservatives.
The Liberal government lost a motion of non-confidence on November 28, 2005. In the resulting January 2006 election, the Conservative Party was elected with a minority government. He did retain his seat by a comfortable margin.