He gained the support of all parties by being bald badass. He was so widely liked in Finnish politics that in 1973 the Finnish parliament just decided to extend his current term by four years without even asking him.
BTW, his first names Urho Kaleva are literally translated as
Urho = strong hero
Kaleva = legendary giant from Finnic mythology
So basicallly his name can be translated as
Strong Legendary Hero Giant