Well, it's a title, and a nationally recognized one at that (not that I think being 'nationally recognized' has much to do with why it should be capitalized, but I digress). To answer your question; yes, I do believe it should be capitalized.
Volcano - The Presidents of the United States of America song - was created in 1997.
There are presidents because people needs someone to be a rolemodel for these 51 united states.
Yes because it is the name of the country: "The United States of America"
The Presidents of the United States of America - album - was created in 1995-03.
The presidents represent a national icon of the United States.
II - The Presidents of the United States of America album - was created on 1996-11-05.
Peaches - The Presidents of the United States of America song - was created on 1996-02-27.
Yes, US mail should be capitalized as it is an abbreviation for United States mail.
A great place to find a list of the Presidents of the United States of America is on Wikipedia. Another website that has the list of US presidents is 'PresidentUSA'.
Maxim Ethan Armbruster has written: 'The presidents of the United States' -- subject(s): Biography, Presidents 'The presidents of the United States and their administrations from Washington to Reagan' -- subject(s): Biography, Presidents
Around $400,000
Flag is capitalized because it is our United States Flag. If you said the flag, it would be lower case.