Whatever I may think of Cruz, I do think that he is legally qualified to be POTUS. However, here is a challenge, from someone who has legal standing, that actually may complicate Cruz' campaign:
"Law Professor Challenges Cruz on Citizenship, Candidacy
A Washington, D.C. law professor has come up with a new way to challenge the eligibility of Ted Cruz, who was born in Canada, to run for president.
Victor Williams is running for president himself.
He says that should help him get over the first hurdle that has so far caused other challengers to stumble -- a lack of legal standing to sue.
Williams, who teaches at the Catholic University law school, has registered to run as a write-in candidate for the Republican nomination in nine states for the sole purpose of challenging the credentials of the man he calls "Canadian Cruz."
He claims Cruz "has fraudulently represented himself as constitutionally qualified for the office of president" and argues that Cruz, who became a naturalized U.S. citizen in 2014, does not meet the Constitution's requirement to be a "natural born citizen."
New Jersey election officials scheduled an administrative hearing for Monday on the issue......"http://www.nbcnews.com/news/us-news/law-professor-candidate-challenges-cruz-citizenship-n554046