RN Collection: Mary Lou McDonald. Sinn Fein Vice President, Mary Lou Mc Donald, will be elected as the new leader and President of Sinn Fein, to succeed Gerry Adams, in February 2018. End. 15/12/2010 Sinn Fein IMF protest. Sinn Fein staged a protest against the EU/IMF deal outside the Dail calling on all TDs to vote against the EU/IMF deal. This is due to the Irish Financial Banking crisis and the International Monetary Fund (IMF) coming to Ireland. Sinn Fein TDs attended the protest as well as Party Vice President Mary Lou McDonald, second from left, with Noeleen Reilly, Shay Fitzpatrick, right, and Allen Donnelly wearing Citizens Army uniforms. Photo. Mark Stedman/RollingNews.ie