BANGKOK Thailand's Supreme Court ordered on Tuesday the country's most powerful and polarising politician Thaksin Shinawatra to be jailed for one year, ruling that he improperly served a 2023 prison term in hospital. Shinawatra's political clan has for two decades been the key foe of Thailand's pro-military, pro-royalty elite who view their populist brand as a threat to traditional social order. The dynasty's momentum is flagging after a litany of legal and political setbacks, culminating in