Won’t matter. Trumpskis are worried that Cruz actually is conservative and their blow hard idol may not end up winning in Iowa and/or New Hapmshire.
Actually, Trumpski’s are prett excited about Cruz being VP.
Of course Trump is worried. Cruz is leading in the first state to vote and in the states with the largest # of delegates. (CA and TX). Trump can’t attack Cruz on policy issues so he concern trolls about the birther issue.