Original: In August 1921 de Valera secured Dáil Éireann approval to change the 1919 Dáil Constitution to upgrade his office from prime minister or chairman of the cabinet to a full President of the Republic .
Simplified: In August 1921 de Valera had Dáil Éireann change the 1919 Dáil Constitution to upgrade his title from prime minister to President of the Republic .