Some of us are old enough that we learned so-called ‘Briticisms’ from our American parents and grandparents...along with being drilled in the American Founding and government.
That could be. But I am not a kid, and I have never heard or read that phrase in all my life. So it must be pretty obscure in this day and age.
I pronounce several words as some Brits and Europeans do, such as "restaurant", because it's the way that many generations of Americans also said it and some of us and our progeny still do.