I have discussed in some detail the legal and constitutional issues surrounding Ted Cruz’s eligibility for the presidency that have been brought to the forefront by Donald Trump’s sustained focus on this issue, forcing Cruz to respond by suggesting that Trump may be being used by Democrats because they prefer to run against Trump than him.
As a political matter, I don’t think Republican voters care all that much about constitutional arcana. What could hurt Cruz is the attention that is being brought to the fact that he was not born in the US and that he also held Canadian citizenship until as late as 2014 when he renounced it. Only 46% of Iowa Republican caucus goers are aware that Cruz was born in Canada. That fact, and that he was a dual citizen until 2014, may hurt him more than anything else and may explain the beginnings of a drop in his poll numbers.
Many of the people on the rabid right wing think that to be a true Merkin you have to be born in the USA so that you don’t acquire irremovable foreign cooties while passing through the birth canal, especially in Canada which is seen by them as being pretty much Communist, what with its socialized medicine, welfare state, and its softer policy towards immigrants.
In return, Cruz seems to be planning to question Trump’s loyalty to the GOP, among other lines of attack, but that may backfire since the antagonism to the party establishment is so great that this will only add support to Trump’s claim that he is the true outsider.