Sinn Féin leader, Mary Lou McDonald, has ruled herself out of running for President. She's told her party colleagues she's not putting herself forward to represent Sinn Féin in next month's Presidential election. AdvertisementMary Lou McDonald, has said she wants to be part of leading efforts to make changes she believes are needed in the country, and continue her work as a TD for Dublin Central. "My job remains to take on this Government, lead Sinn Féin, lead the opposition, work with my Sinn Féin colleagues. "But also colleagues beyond Sinn Féin, not alone to hold Micheál Martin and Simon Harris to account, to keep their feet to their flames for all of their many, many failings.