The purpose with this study is to investigate how the two biggest political parties, the Social Democrats and the Moderate/Conservative Party, looks at a membership in the defense alliance North Atlantic Treaty Organization. The question have the illegal annexation of Crimea affected how the parties look at a membership in Nato will be answered and analyzed. How they discuss, how they believe that a membership can affect the Swedish foreign policy will be examined in this paper. Nato is a topic that during the last century?s have divided the Swedish population into two groups: one that advocates a membership and one that fight?s against a Swedish membership in the alliance. The debate about Nato has, since the illegal annexation of the Crimea, changed and are now more relevant than ever to discuss.