I would say that American poetry has always been a poetry of personal testimony.
Poetry quotes
763 quotes in this category.
Poetry is, first and last, language - the rest is filler.
Still, language is resilient, and poetry when it is pressured simply goes underground.
I definitely wish to distinguish American poetry from British or other English language poetry.
But I don't think that poetry is a good, to use a contemporary word, venue, for current events.