Since he mentions dropping the Canadian at that time, and doesnt mention the Cuban
at all, then it seems reasonable again to assume he had already dropped the Cuban.
**************
I don’t think he could have had Cuban Citizenship as the Cuban Constitution of 1940
which was in force at the time of Ted’s birth prohibits dual citizenship.
http://www.latinamericanstudies.org/constitution/title2.htm
ART. 15. The following lose Cuban citizenship:
1st. Those who acquire a foreign citizenship.
I agree with you about both Cruz Senior and Junior, but my sentence you quoted dealt with Cruz Senior, iirc.