The purpose with this essay is to investigate Swedish political parties who have had or has a restrictive immigration policy containing opinions, that can be classified as xenophobic, and their history and development as a party. The focus in this essay is centred on the politicization that the parties Ny demokrati and Sverigedemokraterna have gone through and the mobilization they have reached. The material that will be handled in this matter are mainly the parties’ political programs that have been published in various forms, but these will be supplemented with secondary sources in the form of previous research, reviews by journalists and other literature. The result have shown that the development from 1970 – 1980´s to today considering these type of organizations is that they have changed in their appearance, in the matter of how they convey their message, and the actual appearance of the party members more than the message itself. The strongest evidence in this matter is Sverigedemokraterna which since the election 2010 has gained entrance in the Swedish parliament as a xenophobic party.

The purpose of this study is to examine the strategic choice of mainstream parties in relation to the competition of voters posed by a niche party and their most important issue, in this case radicalist rightwing populists and the migration issue. The study uses a comparative approach to examine the mainstream parties Social Democrats and Moderates reaction to the niche parties New Democracy 1991-1994 and Sweden Democrats 2010-2015. Using Meguid´s PSO-theory and by performing an qualitative analyse of the parties rhetoric and political suggestions in the parliamentary debates as well as in government bills and reservations in committee reports, the study aims to describe mainstream parties position on the issue and if and how they change position and strategy. The results of the study shows that both mainstream parties over all applies an adversarial strategy, aiming to maintain distance to the niche party and its position but with time and due to changes in the political environment, changes in position and strategy takes place and the mainstream parties applies a slightly more accommodative strategy.