Carmona was very active in the 28th Maycoup d'état of 1926 that overthrew the First Republic. The first Council President, commandant José Mendes Cabeçadas, a democratic sympathizer supported by the last republican president, Bernardino Machado, was succeeded in June by Manuel de Oliveira Gomes da Costa. Carmona, who had been the Minister for Foreign Affairs between 3 June and 6 July, was the leader of the most conservative and authoritarian wing of the military regime, which considered the more moderate Gomes da Costa a liability. On 9 July, he led a countercoup together with general João José Sinel de Cordes, named himself President, and immediately assumed dictatorial powers. He was formally elected to the office in 1928, as the only candidate. In 1928 Carmona appointed António de Oliveira Salazar as Minister of Finance. Impressed by Salazar's charisma and qualities, Carmona nominated Salazar as Prime Minister in 1932, and largely turned over control of the government to him. In 1933, a new constitution officially established the "Estado Novo". On paper, the new document codified the dictatorial powers Carmona had exercised since 1928. However, in practice he was now little more than a figurehead; Salazar held the real power. On paper, the president's power to dismiss Salazar was the only check on his power. However, Carmona mostly allowed Salazar a free hand. He was reelected without opposition in 1935 and 1942 for seven-year terms. In 1935, he signed the law that forbade Freemasonry in Portugal reluctantly, due to his own Freemason past. Although the democratic opposition was allowed to contest elections after World War II, Carmona was not on friendly terms with it. When the opposition demanded that the elections be delayed in order to give them more time to organize, Carmona turned them down. However, there were widespread rumours that Carmona supported the failed military uprising in 1947, which was led by general José Marques Godinho to overthrow Salazar, under the condition that he would remain as President of the Republic. Probably to end these rumours, Carmona finally accepted the title of Marshal. In 1949, Carmona, 79 years old, sought his fourth term as president. For the first time, he actually faced an opponent in General José Norton de Matos. However, after the regime refused to allow Matos to actually run a campaign, he pulled out of the race on 12 February, handing Carmona another term. Carmona died two years later, in 1951, after 24 years as the President of the Republic. He was buried in the Church of Santa Engrácia, National Pantheon, in Lisbon.
Personal life
He was born to Alvaro Rosario Teixeira Carmona, a Portuguese Naval officer from Felgueiras, based in Brazil and part of the Portuguese Military Attache's staff in Brazil. In January 1914, Carmona married Maria do Carmo Ferreira da Silva, daughter of Germano da Silva and wife Engrácia de Jesus. With this marriage he legitimized their three children. He is the grand-uncle of the former Mayor of LisbonCarmona Rodrigues. He is also cousin of Brazilian PresidentAugusto Tasso Fragoso.