Why does the u.s. government accept imperialism as a main policy?

Question:

Why does the u.s. government accept imperialism as a main policy?

Best Answer - Chosen by Asker: We are not an Empire. We are a Democratic Republic. So, how does that make it possible for our government to use this concept for a 'Main Policy' as you state?

Or, is this an attempt to cast your political opinion in a vague and amibiguous question to the public?