For almost 30 years, Kim Carr was a Labor Senator, at one stage he was the father of the Senate, and was a key figure in Labor's left.

But in his new book 'A Long March'  Kim Carr says under the Albanese Government, the party he served, has lost touch with its blue-collar base. He says it's "disturbing development' that the Labor vote is going down in less affluent areas of social disadvantage - and says the Labor project needs to remain viable.

• Guest: Kim Carr
• Producer: Maddie Spencer