I do remember when there was no such thing as dual citizenship. I thought it would need Constitutional change for a US citizen to take on a second citizenship or visa versus. When did it change and why?
“Afroyim v. Rusk, 387 U.S. 253 (1967), is a major United States Supreme Court case in which the Court ruled that citizens of the United States may not be deprived of their citizenship involuntarily. ... The Afroyim decision opened the way for a wider acceptance of dual (or multiple) citizenship in United States law.”
Afroyim v. Rusk - Wikipedia
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>> I do remember when there was no such thing as dual citizenship <<
But then Israel came along and things changed.