Michelsen was a member of Fólkaflokkurin for around 40 years until 2010, when he left the party as a protest against the political course, which in his opinion was pointing in the opposite direction of the parties values.
Michelsen var medlem af Fólkaflokkurin i ca. 40 år frem til 2010, da han meldte sig ud i protest mod partiets kurs, som han mente gik i modsat retning af partiets værdier.