It did little to address what would happen on Day 2, after the United States pulled out of the deal.
This sentence is talking about a hypothetical situation wherein the US pulls out of a nuclear deal with Iran.
Does the comma before the word after imply that that part of the sentence is an afterthought? The sentence would still make sense without that second phrase, but it does clarify the first sentence.
Otherwise, if I move that phrase to the beginning of the sentence, it changes the meaning of the sentence from a hypothetical to a reality:
After the United States pulled out of the deal, it did little to address what would happen on Day 2.
So, why is there a comma before after?
Thank you!