He defeated incumbent Yukon Liberal Cabinet minister Sue Edelman, who had held the riding since 1996.
He served in that capacity until July 3, 2008, when he was appointed the Minister of Health and Social Services and the Minister responsible for the Yukon Workers' Compensation Health and Safety Board.
He retained responsibility for the French Language Services Directorate.
Hart was defeated in his second re-election attempt of 2011, losing to New Democrat Jan Stick, a former Whitehorse City Councillor.
[3] He was active in the establishment of Whitehorse's Meadow Lakes Golf and Country Club, an investment he was required to remain distant from while serving as a minister, in order to avoid the appearance of conflict of interest.