Mario Dumont (born May 19, 1970, in Saint-Georges-de-Cacouna, Quebec) is a television personality and former politician in Quebec, Canada. He was a Member of the National Assembly of Quebec (MNA), and the leader of the Action démocratique du Québec (ADQ), from 1994 to 2009. After the 2007 Quebec election, Dumont obtained the post of Leader of the Opposition in the National Assembly. Following his party's poor showing in the 2008 Quebec election, he announced his resignation as ADQ leader, and subsequently joined the television network V to host a daily news and talk show, Dumont, which began in 2009. He left that network in 2012 to join the all-news channel LCN.