Portugal's ruling Socialists maintained their lead position ahead of Sunday's
election in an opinion poll published on Wednesday, but remained short of a majority, while support for the main opposition surged.
Prime Minister Antonio Costa's center-left party, currently ruling with support from two far-left, eurosceptic parties, stood at 37% of voting intentions in the survey by the Catolica University pollsters for Publico daily and RTP television.
The main opposition Social
Democrats fetched 30%, up from 28% in Catolica's previous poll in May, when the front-running Socialists had 39%.