Yeah, I’ve been down this road before. You will have to prove that Blackwell is the source for the “Natural Born” clause in the U.S. Constitution.
After wrestling with this question for years, I am of the opinion that it was based on Vattel’s work and the SCOTUS got it wrong in the Wong decision because they were trying anything they could to get around the Chinese Exclusion Act.
Wouldn’t be the first time the SCOTUS has played politics and won’t be the last.
Here is a link to a well argued case for Vattel:
http://birthers.org/USC/Vattel.html
Yeah, I know, it’s a “birther” site, but it covers many of the same items I have come across in various history books while researching this issue at various libraries.
Cheers