My hubby and I both sing, so we're good at catching accents (it really does help, something about learning to identify and replicate pitch). When we were in Scotland, after we'd been there about a week we had taken on protective coloration and sounded just about like everybody else. We were dressing like everybody else just because we wanted not to be taken for American tourists.
We'd be talking to people in the street or the post office or wherever, and they'd ask, "Are you on holiday?" (the Scottish equivalent of "You ain't from 'round here, ar you?") We'd say yes, and then they would guess where we were from . . . Yorkshire, Canada, Ireland, Norfolk . . . but never the U.S. And NOBODY would believe us when we fessed up! It was pretty funny.
Hey . . . that reminds me of something! We KNOW Hillary can't sing (remember the "Star Spangled Banner" debacle?) so that's probably why she can't fake an accent either.
I'm just glad she hasn't tried to fake a New York accent. Just the thought makes me want to stick a fork in my ear.