It wasn't a girl scout survey. It was suppose to be an official list of eligible voters who were Canadian citizens from the government.
http://www.breitbart.com/big-government/2016/01/08/ted-cruz-parents-canada-voters-list/
What you mean is it doesn't prove she voted - which would be an act of expatriation. Instead, it shows, in addition to the law operating at the time, that Canada considered her a citizen - she could have voted if she wanted to.
I think she did. She was restarting her life there. Their business was there. Her son was born there. She hadn't been in America for a long time, england before canada. Her husband wasn't an american. she had no expectation of returning, why wouldn't she vote? And there are other ways to prove her willing participation - such as their business licence and taxes.
But even then, it doesn't matter. There are still circumstances where Cruz may not be a citizen under naturalization laws depending. Cruz is not clearly a citizen. he is definitely not natural born.
Agree with the rest, but bolded portion is not true. Afroyim v Rusk (1967):
Syllabus
Petitioner, of Polish birth, became a naturalized American citizen in 1926. He went to Israel in 1950, and in 1951 voted in an Israeli legislative election. The State Department subsequently refused to renew his passport, maintaining that petitioner had lost his citizenship by virtue of § 401(e) of the Nationality Act of 1940 which provides that a United States citizen shall "lose" his citizenship if he votes in a foreign political election. Petitioner then brought this declaratory judgment action alleging the unconstitutionality of § 401(e). On the basis of
Perez v. Brownell, 356 U.S. 44, the District Court and Court of Appeals held that Congress, under its implied power to regulate foreign affairs, can strip an American citizen of his citizenship.
Held: Congress has no power under the Constitution to divest a person of his United States citizenship absent his voluntary renunciation thereof.
Perez v. Brownell, supra, overruled. Pp. 256-268.
(a) Congress has no express power under the Constitution to strip a person of citizenship, and no such power can be sustained as an implied attribute of sovereignty, as was recognized by Congress before the passage of the Fourteenth Amendment, and a mature and well considered dictum in
Osborn v. Bank of the United States, 9 Wheat. 738, 827, is to the same effect. Pp. 257-261.
(b) The Fourteenth Amendment's provision that "All persons born or naturalized in the United States . . . are citizens of the United States . . ." completely controls the status of citizenship, and prevents the cancellation of petitioner's citizenship. Pp. 262-268.
361 F.2d 102, reversed.
However, if Canada at the time didn't recognize dual citizenship and she had to voluntarily relinquish US citizenship to enjoy being a Canadian Citizen, then her US citizenship would no longer be valid.
Of course when you contrast Afroyim with Rogers v Bellei, it becomes obvious that the foreign born child of a US citizen is absolutely not a natural born citizen, as that ruling was that such a person was specifically not afforded the same protections as the citizens referred to in Afroyim.
The Court ruled in Bellei that the foreign born child of a US citizen COULD have their citizenship stripped from them, unlike a natural born citizen or even a naturalized immigrant.