She said it in a 1996 interview with NPR, as reported today on U.S. Uncut.
SCOTT SIMON: I mean, did you ever back in the ’60s, between when — I believe you were a Goldwater girl —
HILLARY CLINTON: That’s right.
SCOTT SIMON: — and whenever you became politically –
HILLARY CLINTON: That’s right. And I feel like my political beliefs are rooted in the conservatism that I was raised with. I don’t recognize this new brand of Republicanism that is afoot now, which I consider to be very reactionary, not conservative in many respects. I am very proud that I was a Goldwater girl. And then my political beliefs changed over time …
Is this important? I dunno. Bernie has always been the same guy.