And the twain shall meet somewhere in between:
I grew up listening to polka, since I grew up in Northeastern Ohio, where there was a large Polish-and-other-Slavic immigrant community. (In fact, until I was in college, I just assumed everywhere had a radio station that played polka and broadcast in Polish for at least part of the day. Well, where I am now there are channels that broadcast Norteño music and broadcast in Spanish part of the day, so that’s similar — a lot of Norteño is polka-influenced.)
And in turn, Norteño, once inflected by other American styles, gave rise to something called Tejano. Did any of this reach the Anglo audience? I give you the Sir Douglas Quintet, practitioners of the Norteño two-step polka beat as filtered through a standard 12-bar blues, who achieved a #13 hit in 1965:
Some background information on Doug Sahm and the band here. Note that despite the lyric, “she,” at least in the video, isn’t much of a mover at all.