Last year the Sweden Democrats won 20 seats at the national election, allowing them to enter parliament for the first time.
The party wants large cuts to be made to the number of immigrants entering Sweden but is accused by opponents of being xenophobic and anti-Muslim.
The Sweden Democrats leader, Jimmie Akesson, says immigration policy has created "parallel societies" in Sweden where immigrants from the Middle East and Africa have become segregated and haven't "assimilated" into Swedish culture.
You can watch the full interview on BBC World News on Tuesday 25th January 2011 at 0430, 0930, 1530 and 2130 GMT and on BBC News Channel at 0430 GMT and 2330 GMT.
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