The migrates who came to South America originally migarted south through North America. They eventually reached South America through the Isthmus of Panama. 
 Yes, tell me a little about the history of South America please. 
 Interesting! What else can you tell me about their politics? 
 Interesting. What can you tell me about their politics? 
 Wow, I wonder why that is? What else can you tell me about the history?
The migrates who came to South America originally migarted south through North America. They eventually reached South America through the Isthmus of Panama.