https://www.cbsnews.com/news/new-pope-could-it-be-american-c...
https://www.cbsnews.com/news/new-pope-could-it-be-american-c...
If there's a political motive in not choosing an American pope until now it's that for most of American history it wouldn't have granted them any influence over American politics. If there's a personal motive it's that until recently they felt insulted that America went for almost 200 years before finally electing a Catholic president.
Tangent: Protestantism is not a religion. The religion is called Christianity. I have seen this trend for quite a while of Protestants (or people born in Protestant countries) of referring to Christianity branches as religions. I find it very segregational. The whole point of all the branches is the same guy whose name begins with C.
But yes, given the state of America today, having an American pope will definitely be an interesting development in the context of many lobbying groups wishing for a vaticanised America.
It seems that the baptist subsection of Christianity already have a bunch of different interpretations of Christian scripture. Historically it's only a matter of time before the inevitable schism, and then they also get to claim to be a different religion.
Protestantism, by definition, is Christianity. The very nature of protestantism is that the Catholic church needed to fix errors and discrepancies. If anything, protestantism advocate that they do christianism right, whereas the Catholic church is a tad sloppy.