Barry Goldwater was born in Arizona in 1909, and ran for the Presidency as a Republican Party candidate in 1964. Goldwater's natural born citizenship status was questioned because Arizona was a territory of the United States, and did not become a state until 1912.
George Romney, who ran for the Republican party nomination in 1968, was born in Mexico to U.S. parents. Romney’s grandfather emigrated to Mexico in 1886 with his three wives and children after Utah outlawed polygamy. Romney's parents retained their U.S. citizenship and returned to the United States in 1912. Romney was 32 years old when he arrived in Michigan. Romney never received Mexican citizenship, because the country's nationality laws had been restricted to jus-sanguinis statutes due to prevailing politics especially aimed against American settlers.
Lowell Weicker, the former Connecticut Senator, Representative, and Governor, entered the race for the Republican party nomination of 1980 but dropped out before voting in the primaries began. He was born in Paris, France and acquired his citizenship at birth through his parents. His father was an executive for E. R. Squibb & Sons and his mother was the Indian-born daughter of a British general.
Róger Calero was born in Nicaragua in 1969 and ran as the Socialist Worker's Party Presidential Candidate in 2004 and 2008. In 2008, Calero appeared on the ballot in Delaware, Minnesota, New Jersey, New York and Vermont.
John McCain, who ran for the Republican party nomination in 2000 and was the Republican nominee in 2008, was born in 1936 at the Coco Solo Naval Air Station in the Panama Canal Zone to U.S. parents.
In March 2008 McCain was held eligible for Presidency in an opinion paper by former Solicitor General Ted Olson and Harvard Law Professor Laurence H. Tribe.
In April 2008 the US Senate approved a non-binding resolution recognizing McCain's status as a natural born citizen. In September 2008 a Federal District judge said obiter that it was "highly probable" that McCain was a natural born citizen of the United States owing to the citizenship legislation existing at the time.
These views have been criticized by Gabriel J. Chin, Professor of Law at the University of Arizona, who claims that McCain was at birth a citizen of Panama and was only retroactively declared a born citizen under 8 U.S.C. § 1403.