^
Read properly.
On a site which has people from all over the world, you call it "Presidential Tweets Part 3!" instead of "US-Presidential Tweets Part 3!".
I am not saying that leaving out the "American"-part in general makes you US-Centric, but just on a worldwide site.
Of course in a group where only US-Americans are involved its totally legit to do that, but not in the internet.