FILE PHOTO: European Commission President Jean-Claude Juncker addresses a news conference at the EU-Western Balkans Summit in Sofia, Bulgaria, May 17, 2018. REUTERS/Stoyan Nenov/File Photo

BRUSSELS (Reuters) - European Commission President Jean-Claude Juncker has confidence in the constructive role a future Slovenian government will play in building a stronger European Union, a spokesman said on Monday.

An anti-immigration opposition party won Slovenia’s parliamentary election on Sunday, taking 25 percent of the vote, according to preliminary results.

“The President is confident that the future government will make a valid contribution or join the effort building a democratic, successful and stronger European Union,” the spokesman said.