Senator hoping for a Mabo decision

Family First Senator Bob Day says he is hoping his High Court challenge to senate voting changes will join other cases like Mabo

Serious questions hang over the future of Family First Senator Bob Day's building companies. Source: AAP

Family First Senator Bob Day is optimistic his High Court challenge to the way voters elect senators will be successful.

Senator Day hopes his case will join other landmark decisions such as Mabo - which recognised the land rights of indigenous Australians.

"I'm always optimistic and it is a brave person who tries to second guess what the High Court might say," Senator Day told reporters in Canberra on Monday.