Labor needs the support of six out of seven crossbenchers to force the Home Affairs Minister into court.
Peter Dutton could find himself without a majority in the lower house if angry Coalition MPs retaliate.
Braddon,Longman,Mayo,Perth and Fremantle:the five seats in play on a crucial night for Malcolm Turnbull and Bill Shorten.
Australians are not lodging'protest votes'. They have changed their democratic preferences.