Cruz’s Achilles heel is his citizenship. The Dems, with their barking dog media, will not allow him to escape a thorough SCOTUS review. They will join with the GOPe to sink his campaign on the eligibility issue. That’s a personal opinion, take it or leave it.
I think it should have been reviewed by SCOTUS with the Obama controversy. Since it wasn’t, I doubt they will take it up now. Even if they did, I think they would declare Cruz eligible.