If that was true we wouldn't have the situation we have....
The spanish culture that dominated latin america for sometime...is to the left, highly filled with bravado, and extremely authoritarian. America is a right-leaning country, masculine but not chest thumping, and highly anti-authority (unless the situation demands it).
Barring latin america dislike of abortions...I see very little in common politically.
Our rugged individualism is almost absent in latin america.