Lincoln had to deal with not only the challenge of the South seceeding from the United States, but also the challenge of raising an army from Northern States who didn't want to get into a war.
I think it really depends on what you believe in. However, if you're talking about a classification of a bi-racial child, then the child is most likely as to what ethnic the father is.
The topic is very controversial because there are several viewpoints.
Some people believe that Mexican immigration has become extremely high, and that it must be somehow restricted. Other people may argue that some Mexicans work jobs that most other people would not want to do. Some of these include working on farms or other dirty jobs.
These opposing viewpoints cause the topic of Mexican immigration to be highly controversial.
Which war? WWI: We were isolationists until illegal German U-boats sank a United States commercial ship called the Lusitania.
WWII: We were isolationists until December 7, 1941 when the Japanese air fleet surprise attacked and bombed us at Pearl Harbor.