About
Mary Lou McDonald is a prominent Irish politician currently serving as the Leader of the Opposition in Ireland, a position she has held since June 2020. She has also served as the President of Sinn Féin since February 2018. As a Teachta Dála (TD) for the Dublin Central constituency since 2011, McDonald has been a vocal advocate for her constituents and a leading voice in Irish politics. Previously, she served as the Vice President of Sinn Féin and as a Member of the European Parliament (MEP).
Career Timeline
Elected to European Parliament
McDonald gains international experience as a Member of the European Parliament.
Elected to Dáil Éireann
McDonald enters Irish Parliament, strengthening Sinn Féin's presence in national politics.
Becomes President of Sinn Féin
McDonald assumes the leadership of Sinn Féin, succeeding Gerry Adams.
Leads Sinn Féin Election Gains
Under McDonald's leadership, Sinn Féin achieves significant gains in the general election.
Appointed Leader of Opposition
McDonald becomes the Leader of the Opposition in Ireland.
Influential Political Figure
McDonald remains a prominent figure in Irish politics, leading Sinn Féin and challenging the government.
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Last updated: February 25, 2026