Breivik has even unsuccessfully tried to start a political party from his cell, said the lawyer, who has written a book about his experience defending Breivik.
"His political project is not finished," he said of Breivik. "He has his extreme right-wing opinions, and is still working to convince others to take up the same opinions."
Lippestad told TV4 he is concerned that the kind of views espoused by Breivik are not being discussed in wider society, allowing them to remain unchallenged.
"In this, Norway hasn't made any progress from where we were two years ago, on July 22. And that worries me," he said.