Republican Sen. Ted Cruz is weighing whether to run for president in 2016. Born in Canada, does Cruz meet the constitutional muster of being a natural-born citizen? The definition has never been decided in the courts and the Constitution doesn’t explain exactly what it means by natural born, according to Peter Spiro, a Temple law professor. “These questions get decided in the court of popular opinion,” said Spiro, who added he thinks Cruz counts as a natural-born citizen. “Why deprive ourselves of having the opportunity to choose somebody on the basis of that kind of formality?”