On what elements is u. s. nationalism based? what complications are there to a "national identity" in the united states?

U.S nationalism is based on patriotism that fosters the feeling of identity among Americans. The fact that American share a common history from the founding of the country through to the overcoming of the various challenges bind them together. Complications to a national identity in the United States include racism and the calamity of slavery that beset the country from its founding.

its perfect how it was

d. it adversely affected american productivity