The BS Canada remarks are completely substance-free and meaningless. At least that would be the first time I ever heard of a negative ad against a candidate for something that happened before he was 4 years old. Do you have any other dirt on Cruz like him throwing a water balloon at his dog or shooting spitballs at someone in kindergarten?
Cruz didn't give up his Canadian citizenship until 2014. Maybe he was just hedging his bets until then.