Explainer: Why one party dominates Singapore politics

Singaporeans are expected to return the People's Action Party (PAP) to power in a July 10 general election, extending its unbroken rule since the Southeast Asian island's independence in 1965.

In that time, Singapore has had only three prime ministers: independence leader Lee Kuan Yew, his cabinet colleague Goh Chok Tong and Lee's son, the present Prime Minister Lee Hsien Loong.