Ehrnrooth aiva wezvematongerwe enyika akarurama uye anorwisana nechiKomonisiti uye akashora Mutungamiri Urho Kekkonen uyo aiva neukama hweushamwari neSoviet Union. Ehrnrooth akanga agumburwa nokutsigira kwaKekkonen kutongwa kwokutonga nokuda kwehondo
mukupera kwema1940. Akasiya bato reSwedish People's Party nguva pfupi mushure mekunge bato ravhotera bhiri rairamba richireba hutungamiriri hwaKekkonen kwemakore mana pasina sarudzo. Bato rake idzva reConstitutional Right Party harina kuwana rutsigiro rukuru, richingowana chigaro chimwe chete musarudzo dzeparamende dza1975 na1983 uye risina zvigaro zvachose musarudzo dza1979, 1987 na1991. Ehrnrooth akadzokera kuSwedish People's Party muma1990.