Rubuta ci gaba don wannan sakin layi - Saarinen ya kasance mai aikin dutse wanda ya shiga reshen kungiyar kwadago ta gari a 1934. A lokacin Yaƙin Duniya na II ya yi yaƙi da sojojin Finland. Saarinen daga baya aka san shi a matsayin daya daga cikin fitattun shugabannin kwaminisanci a wajen Gabashin Gabas. An dauke shi a matsayin Eurocommunist wanda ke da shakku game da Tarayyar Soviet. Saarinen ya yi Allah wadai da mamayewar Czechoslovakia a 1968
kuma a cikin shekarun 1970, ya yi tsayayya da kokarin masu tsattsauran ra'ayi na Stalinist kamar Taisto Sinisalo don kara tasirin Soviet a Finland.