Morgan McSweeney

Morgan James McSweeney is an Irish political strategist for the British Labour Party. He served as Downing Street Chief of Staff under Prime Minister Keir Starmer from October 2024 until his resignation in February 2026. A close colleague and adviser to Starmer for multiple years, he was ranked first in a 2024 New Statesman poll on influential people in UK left-wing politics, and has been compared to Dominic Cummings and Peter Mandelson.