President Tony Tan dissolved Singapore’s parliament on Tuesday at the request of Prime Minister Lee Hsien Loong, who is seeking a fresh mandate from voters worried over immigration and the high cost of living in a slowing economy.

The ruling People’s Action Party, in power for more than 50 years, is widely expected to keep its overwhelming majority in the 89-seat parliament because of a fragmented opposition.

It will be Singapore’s first election without the prime minister’s influential father, independence leader Lee Kuan Yew, who died in March.