Complaints about US propaganda
It's an American made film starring American actors about the US president and his secret service agent. If your not expecting gung ho Americanism and portraying them as heroes then clearly you don't understand film. If it was made in Hong Kong the hero would be a Chinese guy, if it was made in the U.K. It would be a British guy. This is made in the US so yes the main characters are American.
And People keep complaining about the politics, cuz it makes the President out to be a better guy than they usually are. Action movies are pure escapism, why would I want to watch depressing political procedures when I paid to see Gerard butler shoot terrorists?