Joseph Jean-Pierre Marc Garneau, C.C., CD, Ph.D., F.C.A.S.I., MP (born February 23, 1949) is a Canadian politician, retired military officer, former astronaut, and engineer. He has served as the Member of Parliament for the riding of Westmount—Ville-Marie since 2008. On November 28, 2012, Garneau announced his candidacy for the leadership of the Liberal Party of Canada to be decided in April 2013.