He followed the advice of Arius Didymus who told him that "Too many Caesars is not good". (no joke I swear he actually said that) Hope this helps ;)
Answer: Well, according the the all-knowing Googs:
"Immigration to the U.S. in the Late 1800s. Between 1870 and 1900, the largest number of immigrants continued to come from northern and western Europe including Great Britain, Ireland, and Scandinavia. But "new" immigrants from southern and eastern Europe were becoming one of the most important forces in American life."
However!! Uh, There is no 'however', but I hope this lazily-obtained answer helps you, and if it does not, then comment and I will scour the internet for the answer in which. you. seek.
Answer:Immigration isn’t exactly a new occurrence in the United States. Still, despite a rich history of welcoming strangers into the country, it seems that the voices of critics calling for stricter immigration policy only get louder and fears over the negative economic impact immigrants might have continue to grow. It’s worth asking, in a country where nearly everyone’s ancestral line includes an immigration story, how things got that way.
Explanation:
There was a large desire for slaves because these slaves didn't need to be paid, as long as they were fed, they would be able to work for any amount of time for next to no cost at all.