What would America be like if immigrants had never come?

My personal response to the question would be that if America didn't have immigrants well i don't think America would be a very good place to migrate to. America's population belongs to immigrants. Everywhere you go you see immigrants working and trying to live a job but you don`t see many Americans working in the sun, doing crop work or any type of hard labor. When Christopher Columbus came to the Americas he was an immigrant so were all the pilgrims. The only people that aren`t immigrants and know what hard labor is are the Native Americans. So without immigrants America wouldn`t be were it is.