All incumbents were re-elected, except in Halifax where the retiring Alexa McDonough was replaced by another New Democrat, Megan Leslie, and in West Nova the incumbent Liberal Robert Thibault was defeated by Tory Greg Kerr. Elizabeth May of the Green Party was defeated in the riding of Central Nova, which was a battle between her and incumbent cabinet minister Peter MacKay. The Liberal Green Shift was most unpopular in New Brunswick. Three ridings previously held by the Liberals switched to the Tories; Fredericton, Miramichi, and Saint John. In the other seven ridings the incumbent was re-elected. The Bloc Québécois played obstruction in preventing the Conservatives from achieving a majority. Fifteen battleground ridings were in Quebec, with only three changing hands. The BQ lost the riding of Papineau to the Liberals, but gained the riding of Louis-Hébert from the Tories. A recent recount saw the Liberals take the riding of Brossard—La Prairie from the BQ, slightly strengthening their position. Twenty battleground ridings were in Ontario alone, and the Conservatives took the ridings of Brant, Oakville, Huron—Bruce and Halton from the Liberals, where the NDP took Thunder Bay—Superior North, Thunder Bay—Rainy River, Algoma—Manitoulin—Kapuskasing, Sudbury and Nickel Belt from the Liberals. The Liberals themselves lost 16 seats in Ontario. All seats were retained by their incumbent parties. The closest race was Saskatoon—Rosetown—Biggar. There, the incumbent Carol Skelton did not seek reelection, giving the NDP high hopes that well-known farmers' activist Nettie Wiebe might re-establish a federal NDP presence in Parliament from the province. The seat was retained by Conservative Kelly Block in a close two-way race to keep the NDP shut out in Saskatchewan - despite the fact that their proportion of the popular vote there was in fact higher than any other province outside Atlantic Canada. Arguably the Conservatives' power base, Alberta's Tory incumbents were all re-elected except for the riding of Edmonton—Strathcona, which the NDP narrowly took that riding with 442 votes. The Conservatives regained the seats lost in the 2006 election and held on to seven of the ten battleground ridings. They took the ridings of West Vancouver—Sunshine Coast—Sea to Sky Country from the Greens and Richmond from the Liberals. Liberal candidate in the Yukon and the NDP candidate in Western Arctic (the Northwest Territories) won re-election.