Singapore’s leaders need strong backing from voters to weather uncertain times, Prime Minister Lee Hsien Loong said as he called on members of the ruling party to prepare for a “tough fight” at the next general election.Speaking at the People’s Action Party convention, Lee pointed to some economies around the world where public faith in governments has eroded, and both traditional and socialist parties have been weakened, The Straits Times reported. Populist movements may have upended the…