DUBLIN: Irish Prime Minister Bertie Ahern was on course to win a third successive term on Friday but may have to find a new coalition partner to be sure of a parliamentary majority, said pollsters and political analysts. ``It's very tight,'' said the former Prime Minister, Garret FitzGerald, as officials counted votes cast in Thursday's election. ``In the last week, voters have swung back to [Ahern's] Fianna Fail,'' he told Reuters at a Dublin counting centre. ``On the exit poll it looks as if they have the advantage.'' In an election where there was little separating the main parties on tax and spending, opponents tapped into a sense that the spoils of Ireland's economic boom had been squandered, pointing to overstretched health and transport services.