We know that Mr. Cruz plans to renounce his Canadian citizenship. The assumption is that this will be easy for him to achieve. This is because:
1. Unlike the United States, Canada views citizenship as voluntary membership in a political community. The United States views citizenship as as a form of “servitude” to the state;
2. The assumption is that Cruz was also born a U.S. citizen. In other words, Mr. Cruz would have another citizenship to go to if and when he renounces his Canadian citizenship. Mr. Cruz better hope that Canada will simply accept his claim of being a U.S. citizen (without forcing Mr. Cruz to prove his U.S. citizenship).