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In page Gary Doer:

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On August 27, 2009 Doer announced he would not seek re-election in the 2011 election, and on August 28, 2009 he was nominated by Prime Minister Stephen Harper to succeed Michael Wilson as Canadian ambassador to the United States. He was formally sworn into that position on October 19, 2009, and on the same day Greg Selinger was sworn in as his replacement as Premier of Manitoba. Doer's former constituency assistant Matt Wiebe subsequently won the by-election to succeed Doer as MLA for Concordia on March 2, 2010.[1]