Chairman of the Finnish Social Democratic Party Antti Rinne and his wife Heta Ravolainen-Rinnes attend the election party in Helsinki, Finland April 14, 2019. Lehtikuva/Antti Aimo-Koivisto via REUTERS HELSINKI (Reuters) - Finland’s leftist Social Democrat party (SDP) leader Antti Rinne has declared victory in Sunday’s general election, after partial results showed his party winning by…