Thailand's top court is due to make a ruling Tuesday which could see the kingdom's most powerful and polarising statesman jailed in a watershed moment for his imperilled political dynasty.

The political clan of Thaksin Shinawatra 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.

But the dynasty's momentum is flagging after a litany of legal and political setbacks, last week culminating in their party being ousted from the prime minister's office.

Thaksin faces a day of personal reckoning on Tuesday, when the Supreme Court is scheduled to issue a ruling on whether he properly served a prison term in 2023.

Analysts say the ruling -- due from around 10:00 am (0300 GMT) -- may see him ja

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