McDonald may find devil is in the details if she gets TV spot with Varadkar and Martin

Promises: Housing spokesperson Eoin Ó Broin, finance spokesperson Pearse Doherty, president Mary Lou McDonald and Shane O’Brien, candidate for Dún Laoghaire, at the launch of Sinn Féin’s General Election manifesto at the Temple Bar Gallery and Studios in Dublin. Photo: Collins

Colette Browne

The perceived wisdom is that the inclusion of Mary Lou McDonald in RTÉ's forthcoming leaders' debate would be a win for Sinn Féin. In reality, Fine Gael and Fianna Fáil could be the biggest beneficiaries.