Primary voters in six states selected their Democratic and Republican candidates to run for Congress.
Brendan Boyle, whose father emigrated to the US from Glencolmcille in 1970, saw off a formidable challenger, Margorie Margolies, mother-in-law of Chelsea Clinton.
He's now the Democratic pick for Pennsylvania’s 13th congressional district in what is seen as a major win for the 37-year-old state representative.
The Irish Times reports how Mr Boyle’s father Frank, who grew up in the Donegal Gaeltacht, changed his working hours cleaning Philadelphia’s subway stations so he could canvas for his son in the evenings.
Brendan Boyle regularly referred to his father’s working class roots in debates with the other Democrat candidates.