A change in government has cast doubt on plans for a Bangkok Grand Prix, but observers remain hopeful that the country will one day join Singapore as Southeast Asia’s second F1 host. BANGKOK: Formula 1 is expanding its lucrative global calendar – and Thailand wants in. The country aspires to join Singapore as Southeast Asia’s second Grand Prix host , part of Bangkok's billion-dollar push to draw tourists with world-class events. But shifting political winds in the Thai capital may stall those