There are more than 20 federal MPs and senators who were born overseas. Some of them have clarified that they are not dual citizens.
Several foreign-born federal politicians have come out to clarify the validity of their election after Larissa Waters became the second Greens Senator to resign over holding dual citizenship.
The Greens co-deputy leader resigned on Tuesday after realising she has dual Australian-Canadian citizenship.
She joins colleague Scott Ludlam who resigned just days earlier after revealing he holds New Zealand citizenship.
