All this assumes that immigration law was the same as in 1961 when these men were born.
There are several schools of Birther "thought" that hold that the birth certificate is irrelevant, because, as the son of a non-citizen, BO cannot ipso facto be a Natural Born Citizen. Immigration law has no bearing on that issue.
“All this assumes that immigration law was the same as in 1961 when these men were born.
“
The specific law is Title 8 Section 1401 and was in place in 1952.