[xzins]

Although Canada restricted dual citizenship between 1947 and 1977, there were some situations where Canadians could nevertheless legally possess another citizenship. For example, migrants becoming Canadian citizens were not asked to formally prove that they had ceased to hold the nationality of their former country.

Yes it is. It's right there.

Migrants were not asked PROVE, the were only asked to renounce. In fact, current law encourages still encourages it. Says there could be problems with it.

And, of course, it's also Cruz Sr's track record. He didn't have to renounce Canadian citizenship when he took US citizenship, but he did.

[Brown Deer]

Migrants were not asked PROVE, the were only asked to renounce.

Really? Who told you that?