It's expected Australian Prime Minister Malcolm Turnbull will force an early election after legislation aimed at re-introducing the construction watchdog was blocked.
It was the second time the Australia Building and Construction Commission bill had been before the house and it was again voted down, this time 36-34.
Last month Mr Turnbull promised if the bill was blocked this time around, he would dissolve both houses of parliament in what's called a double dissolution election.
It's a rare move -- the last one was in 1987. It would mean an early election and more than 100 days political campaigning.
After the campaign, Australia faces the possibility of a sixth leader in as many years.
If it is to go ahead, the forced early election will take place on July 2.