He serves as a deputy representative to the Norwegian Parliament from Hordaland during the term 2005–2009.
He supports a greener and more liberal Norway. Michelsen supports the entry of Norway into the "warmth of Europe", the European Union, although the parent party Venstre ("Left") does not agree.
As of 2005, Michelsen worked towards modernising the Young Liberals by introducing blogging, house-visiting and telephone-calling to get a more direct contact with the politicians. These methods are not yet considered normal for political parties in Norway.