Here is my screen when going to Kagi's news page, which defaults to "World", and New Zealand search region:

6 headlines are visible, each of which mentions Trump, the leader of the United States of America. This is what I would have expected to see in the USA category. (Clicking to the USA category, the top 6 headlines also mention Trump.)
What's the point of World if it's just USA? I would have expected World to lead with a more diverse set of countries - maximum one result from the United States. As I'm in New Zealand, I would have expected it to be weighted more towards news involving us and Australia, possibly also China.