Fergus Finlay: If a grand coalition collapses, it will usher in a decade of Sinn Féin

I've no idea what Fine Gael leader Leo Varadkar and Fianna Fáil leader Micheál Martin were trying to achieve at the start of their election campaigns, or even as the seats were being counted.

But along the way, they’ve both eliminated the logical — some would argue the most democratic — outcome of the election.