New Singapore opposition party launches as polls loom A new opposition party backed by the estranged brother of Singapore's prime minister is launched in a fresh challenge to the government as speculation mounts elections could be called soon. The Progress Singapore Party (PSP) -- aiming to contest an election due by 2021 but widely expected earlier -- is led by Tan Cheng Bock, a medical doctor and former government stalwart who once ran for president and nearly defeated the establishment candidate. IMAGES AND SOUNDBITES at the PSP launch