Question: Who is the present leader of the party that headed a minority government after the Canadian federal election, 2008 ? 

Context paragraphs:
Canadian federal election, 2008: The 2008 Canadian federal election (more formally, the 40th Canadian General Election) was held on Tuesday, October 14, 2008 to elect members to the House of Commons of Canada of the 40th Canadian Parliament after the previous parliament had been dissolved by the Governor General on September 7, 2008.  The election, like the previous one in 2006, yielded a minority government under the Conservative Party of Canada, led by the incumbent Prime Minister, Stephen Harper.

Conservative Party of Canada: The Conservative Party of Canada (French: "Parti conservateur du Canada" ), colloquially known as the Tories, is a political party in Canada.  It is positioned on the right of the Canadian political spectrum.  The party's leader is Andrew Scheer, who serves as Leader of the Official Opposition.

Odina Desrochers: Odina Desrochers (born May 25, 1951 in Joly, Quebec) is a Canadian politician.  He was a member of the "Bloc Québécois" in the Canadian House of Commons.  He was first elected to the house in the Canadian federal election, 1997 from the riding of Lotbinière.  He was re-elected in the Canadian federal election, 2000 in the riding of Lotbinière—L'Érable and again in the Canadian federal election, 2004 from the riding of Lotbinière—Chutes-de-la-Chaudière.  Desrochers served as the "Bloc's" critic on issues concerning Latin America and Africa, and was also the critic for Regional Development, Rural Development, Public Accounts, the Treasury Board, and Infrastructure.  Desrochers was defeated in the 2006 election by Conservative farmer Jacques Gourde.

Timeline of the Canadian federal election, 2008: The 2008 Canadian federal election (more formally, the 40th Canadian General Election) was held on Tuesday, October 14, 2008 to elect members to the Canadian House of Commons of the 40th Canadian Parliament after the previous parliament had been dissolved by the Governor General on September 7, 2008.  The election yielded a minority government under the Conservative Party of Canada, led by the incumbent Prime Minister, Stephen Harper.

United Kingdom general election, 1852: The July 1852 United Kingdom general election was a watershed in the formation of the modern political parties of Britain.  Following 1852, the Tory/Conservative party became, more completely, the party of the rural aristocracy, while the Whig/Liberal party became the party of the rising urban bourgeoisie in Britain.  The results of the election were extremely close in terms of both the popular vote and the numbers of seats won by the two main parties.  As in the previous election of 1847, Lord John Russell's Whigs won the popular vote, but the Conservative party won a very slight majority of the seats.  However, a split between Protectionist Tories, led by the Earl of Derby and the Peelites made the formation of a majority government very difficult.  Lord Derby's minority Protectionist government ruled from 23 February 1852 until 17 December 1852.  Derby appointed Benjamin Disraeli as Chancellor of the Exchequer in this minority government.  However, in December 1852, Derby's minority government collapsed because of issues arising out of the budget introduced by Disraeli.  A Peelite-Whig coalition government was then formed under Lord Aberdeen, one of the leading Peelites.  Although the immediate issue involved in this vote of "no confidence" which caused the downfall of the Derby minority government was the budget, the real underlying issue was repeal of the Corn Laws which parliament had passed in June 1846.

Canadian federal election, 1926: The Canadian federal election of 1926 was held on September 14 to elect members of the Canadian House of Commons of the 16th Parliament of Canada.  The election was called following an event known as the King-Byng Affair.  In the 1925 federal election, Prime Minister William Lyon Mackenzie King's Liberal Party of Canada won fewer seats in the Canadian House of Commons than the Liberal-Conservatives of Arthur Meighen.  Mackenzie King, however, was determined to continue to govern with the support of the Progressive Party.  The combined Liberal and Progressive caucuses gave Mackenzie King a plurality of seats in the House of Commons, and the ability to form a minority government.

By-elections to the 42nd Canadian Parliament: By-elections to the 42nd Canadian Parliament are held to fill vacancies in the House of Commons of Canada between the 2015 federal election and the 43rd Canadian federal election.  The 42nd Canadian Parliament has existed since 2015 with the membership of its House of Commons having been determined by the results of the Canadian federal election held on October 19, 2015.  The Liberal Party of Canada has a majority government during this Parliament.

Dale Johnston: F. Dale Johnston (born November 14, 1941 in Ponoka, Alberta) is a former Canadian politician.  He began his career in politics in 1986 as a councillor in Ponoka, and he then became reeve in 1989.  In Canadian federal election, 1993, he was elected into the House of Commons of Canada.  He was elected as a member of the Reform Party of Canada in the riding of Wetaskiwin.  He was re-elected in the Canadian federal election, 1997, and in the Canadian federal election, 2000 (as a member of the Canadian Alliance) and again in the Canadian federal election, 2004 (as a member of the Conservative Party of Canada).  A farmer, he served as Chief Opposition Whip and Whip of the Conservative Party from 2002 to 2004 and twice more in 2004.  He has also been the Opposition critic to the Minister of Labour and to Parliamentary Affairs.  Currently he is Vice-Chair of the Standing Committee on Procedure and House Affairs.  Johnston retired from parliament at its dissolution prior to the 2006 federal election.

Canadian federal election, 1972: The Canadian federal election of 1972 was held on October 30, 1972, to elect members of the Canadian House of Commons of the 29th Parliament of Canada.  It resulted in a slim victory for the governing Liberal Party, which won 109 seats, compared to 107 seats for the opposition Progressive Conservatives.  A further 48 seats were won by other parties and independents.  On election night, the results appeared to give 109 seats to the Tories, but once the counting had finished the next day, the final results gave the Liberals a minority government and left the New Democratic Party led by David Lewis holding the balance of power.  See 29th Canadian parliament for a full list of MPs elected.

Canadian federal election, 2004: The Canadian federal election, 2004 (more formally, the 38th General Election), was held on June 28, 2004, to elect members of the House of Commons of Canada of the 38th Parliament of Canada.  The Liberal government of Prime Minister Paul Martin lost its majority, but was able to form a minority government after the elections.  The main opposition party, the newly amalgamated Conservative Party of Canada, improved its position but with a showing below its expectations.

Supporting paragraphs: Canadian federal election, 2008 Conservative Party of Canada
Answer: Andrew Scheer,