Turnbull hopeful on marriage vote

Malcolm Turnbull remains hopeful, despite conceding he doesn't have the numbers in the Senate, the government can pass the same-sex marriage plebiscite bill.

Prime Minister Malcolm Turnbull concedes he doesn't have the numbers in the Senate to pass the same-sex marriage plebiscite bill.

But he remains hopeful.

"At this stage more senators are saying they will vote against it, but we will continue to press the Labor party," he told reporters in Hobart on Friday.