Answer
The longest tenured role of Charles Haughey's political career was Teachta Dála, which is Irish for Member of Parliament. Haughey was first elected to the Dáil in 1957 and served continuously until 1997. During his time in the Dáil, Haughey served as Taoiseach (Prime Minister) on three separate occasions, as well as holding a number of other cabinet positions.