Left-wing Greens Senator Lidia Thorpe is under investigation over whether she breached any confidence when dating an ex-gang leader while being a member of the law enforcement committee.
It comes as Labor and the Coalition are both placing pressure on Greens leader Adam Bandt to take stronger action against Thorpe, who announced her resignation from her role as Greens deputy leader in the Senate on Thursday. Thorpe will still retain her senator seat.