Senator Hillary Rodham Clinton has the freakish ability to detect distant Irish ancestry. Aussie Dominic Dunne met her at a book-signing in Washington, just after a group of Irish tourists.
After the Irish family had their book signed, I approached the altar and stood before the high priestess, who said perfunctorily: "How are you?", as she started to scribble her name, without extending so much as a glance in my direction.
"Very well thank you, Senator. How are you?" She suddenly looked up, taken, I assumed, by my Australian accent.
"Oh, very well, thank you!" she said, looking me in the eye. She signed the book and off I walked, overhearing her say to her assistant, "Everyone's from Ireland tonight".
I wanted to turn around and say: "Senator, you either know nothing or you're very perceptive. I speak with not a scintilla of an Irish accent, yet somehow you can detect my Irish roots." However, I feared her minders would remove me before I had the chance to explain that my ancestors lived in County Kildare. [Link]

I think someone is forgetting that Hillary is the smartest woman in the world, so if she says you're Irish, that's all there is to it.