Australia¡¯s opposition Labor party pulled off a huge electoral turnaround in a key state on Saturday, positioning it to oust the ruling Liberal-National Party in a voter backlash that threatens the future of Prime Minister Tony Abbott.

Abbott said Sunday his government had ¡°lessons to learn¡± from the rout in Queensland amid growing leadership questions after his unpopular move to knight Britain¡¯s Prince Philip.

Rumors of challenges to Abbott¡¯s position as prime minister have emerged over the past week after the knighthood decision. But the demise of the Liberal-National coalition in Queensland¡¯s elections Saturday has piled further pressure on him.