Australian Prime Minister Julia Gillard has dared her political rival, former foreign minister Kevin Rudd, to challenge her in a leadership vote next week, hoping to end infighting that threatens to sink the minority government and its reform agenda.
Ms. Gillard called on Thursday for the vote to be held by ruling-party lawmakers next Monday, gambling that a victory for her would silence Mr. Rudd whom she accused of trying to destabilize her unpopular government and regain the top job.
The Gillard-Rudd rivalry has been brewing since she replaced him as prime minister in a late-night coup in 2010. It burst into the open on Wednesday when Mr. Rudd quit as foreign minister while on a trip to Washington, saying he could no longer work with Ms. Gillard and that she could not win the next election, due next year.
"Following Kevin Rudd's resignation yesterday, I have formed this view that we need a leadership ballot in order to settle this question once and for all," Ms. Gillard told reporters, keeping composed and trying to contrast Mr. Rudd as a "chaotic" leader.
"For far too long, we have seen squabbling within the Labor Party. Australians are rightly sick of this, and they want it brought to an end," she said.
Ms. Gillard said she expected Mr. Rudd to stand for the leadership, though he had yet to declare whether he would contest.
Most analysts believe, however, that any changes would not save the party from defeat at the polls.
"Labor is going to lose the next election. The current government can't get itself out of the doldrums and this is likely to drag on for the rest of the year," Sydney University political analyst Peter Chen said.
"If Labor changes to Kevin Rudd, they will find his support is much softer than people think," he said, adding that if Mr. Rudd lost the vote, he would remain a divisive and destabilizing figure within the government.
A Monday vote limits Mr. Rudd's ability to build sufficient support to replace Ms. Gillard. Mr. Rudd is travelling back to Australia from Washington, where he was on an official visit when he suddenly quit as foreign minister.
"I'm very pleased and encouraged by the amount of positive support and encouragement of me to contest the leadership of the Labor Party," he said in a televised news conference from Washington before boarding a flight home.
Opinion polls show Mr. Rudd remains more popular with voters but is not well liked by party MPs, who select their leader.
Ms. Gillard is backed by most of them, including most senior cabinet members, making it unlikely Mr. Rudd can mount a successful challenge.
If, however, he did win, Mr. Rudd would have to renegotiate deals with the Greens and at least two independents to keep the government's one-seat majority in the hung parliament.
If he couldn't, he would have to call an early election which Labor would probably lose, putting at risk the future of key reforms such as a carbon tax and 30 per cent tax on coal and iron ore mine profits, both due to start on July 1.
Opposition Leader Tony Abbott has vowed to scrap the mining tax and carbon tax if he wins power.
Senior government ministers rallied behind Ms. Gillard on Thursday, led by Deputy Prime Minister and Treasurer Wayne Swan, who cancelled a planned trip to Mexico for a G20 finance ministers' meeting.
"I believe there is very strong support for the prime minister," he told Australian radio, saying Mr. Rudd was running a stealth campaign to undermine Ms. Gillard's leadership.
Other senior ministers also expressed support for Ms. Gillard.
"We need to get out of this idea that Kevin is a Messiah who will deliver an election back to us. That is just, I think, fanciful," Attorney-General Nicola Roxon said.
But Immigration Minister Chris Bowen and Resources Minister Martin Ferguson, both senior cabinet ministers, publicly supported Mr. Rudd.
"In my opinion, Kevin Rudd is best placed to take on Tony Abbott and potentially in the best position to win the next election," Mr. Ferguson told reporters.