Cruz is not a judge. He will never be a Supreme Court justice.
You do not have to be a judge to be a Supreme Court justice. Technically, I don't think you even have to be a lawyer.
You don’t have to be a judge to be a supreme court justice. You don’t even have to have a degree in law. There are no requirements listed in the Constitution. My 1 year old son is eligible and could be nominated.
You don’t have to have already been a judge to be appointed to the Supreme Court. You don’t even have to be a lawyer, other than that has been the tradition.