PoD: Pedro II isn't overthrown in 1889 and the Empire of Brazil lives on into the 20th century. Just that.
One can assume the butterflies will be minimal in Portugal.
In 1932 Manuel II dies in exile without issue or close relatives. Around that time Salazar's Estado Novo is in the process of establishing itself with a (republican) constitution.
IOTL Salazar thought that after the death of Manuel II all reasonably legitimate claims to the Portuguese throne died with him and restoring the monarchy really served no purpose. Although he was far from hostile towards the monarchists he kept Portugal as a republic.
ITTL Salazar offers the throne to Pedro III of Brazil (Pedro II's grandson). He doesn't offer him any kind of real power, he just offers him to be the titular king of Portugal with the sole power of nominating a regent to act as head of state on his behalf (à la Governor-General of Canada or Australia).
Estado Novo could then profit from associating itself with an 800 year-old institution without the burden of maintaining a puppet king.
The republicans wouldn't be that much alienated because - let's face it - Canada and Australia are as much republics as the USA.
Furthermore such a dynastic union would psychologically "reunite" the old Portuguese Empire and that would be great publicity for a regime with such a nationalist agenda.
So the Emperor Pedro III of Brazil must now ask the Brazilian parliament for permission to also become King Pedro VI of Portugal. If by the 1820s and 1830s the Brazilians - after having recently conquered their independence - had much to fear from a dynastic union with Portugal, at this point I can't see that much opposition towards Salazar's proposal.
1) In the early 19th century Portuguese and Brazilian population were more or less matched but by 1932 Brazil had already far outgrew Portugal and tiny Portugal was no threat for gigantic Brazil.
2) The Portuguese could not gain any relevant influence in the Brazilian affairs. If anything the common monarch would be a Brazilian living in Brazil.
Such union could survive to these days even with the eventual fall of the Estado Novo. The Emperor of Brazil and King of Portugal could over time become King of Angola, Mozambique, etc. as these countries start declaring their independence.
One can assume the butterflies will be minimal in Portugal.
In 1932 Manuel II dies in exile without issue or close relatives. Around that time Salazar's Estado Novo is in the process of establishing itself with a (republican) constitution.
IOTL Salazar thought that after the death of Manuel II all reasonably legitimate claims to the Portuguese throne died with him and restoring the monarchy really served no purpose. Although he was far from hostile towards the monarchists he kept Portugal as a republic.
ITTL Salazar offers the throne to Pedro III of Brazil (Pedro II's grandson). He doesn't offer him any kind of real power, he just offers him to be the titular king of Portugal with the sole power of nominating a regent to act as head of state on his behalf (à la Governor-General of Canada or Australia).
Estado Novo could then profit from associating itself with an 800 year-old institution without the burden of maintaining a puppet king.
The republicans wouldn't be that much alienated because - let's face it - Canada and Australia are as much republics as the USA.
Furthermore such a dynastic union would psychologically "reunite" the old Portuguese Empire and that would be great publicity for a regime with such a nationalist agenda.
So the Emperor Pedro III of Brazil must now ask the Brazilian parliament for permission to also become King Pedro VI of Portugal. If by the 1820s and 1830s the Brazilians - after having recently conquered their independence - had much to fear from a dynastic union with Portugal, at this point I can't see that much opposition towards Salazar's proposal.
1) In the early 19th century Portuguese and Brazilian population were more or less matched but by 1932 Brazil had already far outgrew Portugal and tiny Portugal was no threat for gigantic Brazil.
2) The Portuguese could not gain any relevant influence in the Brazilian affairs. If anything the common monarch would be a Brazilian living in Brazil.
Such union could survive to these days even with the eventual fall of the Estado Novo. The Emperor of Brazil and King of Portugal could over time become King of Angola, Mozambique, etc. as these countries start declaring their independence.