Sanna Marin's fight for survival in Finland's election.

Finland's Prime Minister Sanna Marin is facing a tough election battle as her centre-left Social Democrats are neck and neck with the right-wing, populist Finns Party and the centre-right National Coalition Party. The election takes place amid unprecedented international focus over Finland's application to join the Nato military alliance. Marin's popularity remains high despite the popularity of the centre-right and the populists. The Finns Party is pro-meat, pro-cars, anti-climate action, and anti-immigration. Finland's multi-party system makes it quite possible that no party will win more than a fifth of the vote, so whoever wins will need to persuade other parties to take part.