On April 18, 1936, he wed Yolette Leconte, a direct descendant of Jean-Jacques Dessalines; the marriage lasted till her death in 1981.

In January 1946, the population rose up against President Elie Lescot who found himself in great difficulty in Port-au-Prince.

Lescot would later be accused by parliamentary committees of having used public funds to participate in World War II alongside the United States of America without taking into account the daily realities of the Haitian masses or the interests of Haiti.

Magloire therefore proposes to President Élie Lescot to hand over power to a military junta of 3 members including Magloire himself who will occupy the post of Minister of the Interior and National Defense, from January 12 to August 16, 1946, Colonel Franck Lavaud and Antoine Levelt.

Shortly after he came to power in December 1950, he amended the constitution to set up, by referendum, a republican presidential regime and broke with parliamentarism.

During his reign the streets of Cap-Haitien were asphalted, and the monuments of Vertières as well as the gatehouses of Barrière-Bouteille were built at the southern entrance to the capital.

In that year Hurricane Hazel ravaged the country, and funds intended to provide relief for the populace were often stolen before they could reach those in need.

On October 15, 1957, about a month after Duvalier became president, Magloire was officially condemned to exile and stripped of his Haitian citizenship.

In 1986, when Duvalier's son and successor Jean-Claude lost office, Magloire left New York and returned to Haiti.