Ireland's elections are usually two-horse races. But this time there's a third contender, as a party with historic links to the Irish Republican Army soars in the polls.
As Irish voters prepare to choose a new parliament on Saturday, a restive electorate is rattling the two parties that have dominated the country's politics since it won independence from Britain a century ago, Fianna Fail and Fine Gael.
Polls show a surprise surge maybe even a lead for Sinn Fein, the party historically linked to the IRA and its violent struggle for a united Ireland
