Ukraine’s Zelensky urged both the European Union and the United States for unity on Thursday ahead of Trump’s return to the White House, stressing that “European guarantees won’t be sufficient for Ukraine” and the importance to secure a durable peace.
In casual writing its unusual to separate lists of two with a comma, but it reads quite clearly, no?
In the context of a headline it parses naturally to me
I’ve only gotten used to it in headlines recently. It confused me at first.