While polls are open for a day only, election results could take weeks to emerge in full.
The last winners in the polls were the Social Democrats in 2015, who ruled on a shaky minority government.
After 11 days in power, they were replaced by Antonio Costa’s Socialist Party, which governed with the help of Portugal’s left-wing.
They have spent the last four years in government under considerable scrutiny, as people initially feared another faltering short-term government.
source: express.co.uk