Any talk about Cruz follows years of discussion about birthplace and presidential eligibility involving President Obama, Sen. John McCain, and Sen. Marco Rubio. The bottom line in the case of Cruz, who was born in Canada in 1970, is that his father was an immigrant from Cuba and not a U.S. citizen at the time of young Cruz’s birth, but his mother was born and raised in the United States. The law in effect then, and now, made Ted Cruz a U.S. citizen at birth. Although the drafters of the Constitution did not define what they meant when they required an American president to be a “natural born citizen,” it is generally thought that “citizen by birth” is the best modern-day equivalent. On that basis, Cruz appears entirely eligible — if he ever chooses to pursue the White House.