BALLINA, Ireland, April 14 (Reuters) - U.S. President Joe Biden on Friday was set to wrap up his nostalgic three-day tour to Ireland, the longest ever by an U.S. leader, with a rally in the West of Ireland hometown of his great-great-great-grandfather. Biden started his tour on Wednesday in Belfast on a more serious note by urging political leaders there to restore their powersharing government. Biden will address a crowd in front of St Muredach's Cathedral, whose construction Blewitt was involved with in the 1820s. "It is a homecoming for him," said Joe Blewitt, a distant cousin of Biden's. Ahead of the visit the town was being decorated with U.S. flags, bunting and cardboard cutouts of Biden peering out of windows.

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