Original: A member of Fianna Fáil, he held a number of ministerial posts in the cabinets of Éamon de Valera, Seán Lemass and Jack Lynch, becoming Tánaiste in 1969.
Simplified: As member of Fianna Fáil, he held a number of ministerial posts in the cabinets of Éamon de Valera, Seán Lemass and Jack Lynch, becoming Tánaiste Deputy head of the government) in 1969.