In the 2019 parliamentary election, Rinne led the Social Democrats to victory and served as Speaker of Parliament before being appointed Prime Minister on 6 June 2019.

[6] Rinne and his cabinet resigned on 3 December 2019, when the Centre Party withdrew its support[7] due to the 2019 Finnish postal strike.

[9] On 11 December 2019, Rinne was elected as the First Deputy Speaker of the Parliament, replacing Tuula Haatainen, who was then named as the Minister of Employment in the Marin Cabinet.

The conviction was upheld by an appellate court with an additional decision at the end of 2018 which also ordered Rinne to pay fines and legal costs to Metsäteollisuus, and advocacy group for the forest industry.

[13][14] Rinne had to resign from an ACP (Automotive, Cargo and Ports worker's union, Finnish: AKT) lawyer position, because he had charged twice for the same work-related commute.

The Suomen Kuvalehti reported that he had failed to return the receipts for the year and had paid for his own telephone bill from the housing company's bank account.