Where are you getting this from? There's NO way Obama won English Americans, and he probably did a lot better with Poles, Vietnamese, and Greeks.
Filipino Americans: 54/45 Obama
Vietnamese Americans: 57/42 Romney
No way in hell Viets voted for Romney like that. And yay for Filipino Americans not voting for Romney as I feared.
I read an article that showed that Viets vote overwhelmingly GOP as a result of surviving Communism (much like Cuban Americans.) There is no way that Romney did that we'll with Irish Americans, at least the Irish Catholics. And Romney had to have done way better than that with Scottish Americans (then again, I'm half Scottish by ancestry and a Republican, so maybe that colors my view.)