Thai ex-Prime Minister Thaksin Shinawatra entered prison to begin serving an 8-year sentence Tuesday, hours after returning to the country after years of self-imposed exile. The divisive former leader returned the same day that a party affiliated with him faces a key vote on its path to form a new government. Thaksin has said his decision to return has nothing to do with the Pheu Thai party’s bid for power, but many believe the party made deals with pro-military parties to facilitate the 74-year-old billionaire’s return.