In the 2006 election, he defeated Conservative opponent and former Nova Scotia cabinet minister Greg Kerr by 511 votes.
Thibault was defeated in Canada's 40th general election on October 14, 2008, by Conservative opponent Greg Kerr.
[8] On October 3, 2009, Thibault was once again nominated to contest the West Nova seat for the Liberals in the 2011 federal election.
[10] In August 2008, Thibault caused controversy with some accusing him of ageism when he suggested that his Conservative opponent Greg Kerr was too old for the job.
[11] Only five days later, Thibault was accused of sexism when he called Marjory LeBreton, then government leader in the Senate, an "idiot" and suggested she should "go back to making tea" for former prime minister Brian Mulroney.