Federal Opposition leader Brendan Nelson says he will lead the coalition to the next election.
Despite renewed speculation that his leadership is doomed if his standing in the polls doesn't improve, Dr Nelson said he remained determined to continue in the job.
"People have said to me, from the day that I took this job, they said, look it's the worst job in Australia in politics," he told ABC radio.
"But if I listened to commentators instead of doing what I think is right, then I'd be losing objectivity.
"I am absolutely determined with everything I've ever done in my life to see it through, and I will lead us through to the next election."
Dr Nelson also refused to reveal if he knew the intentions of former Treasurer Peter Costello who is yet to announce if he will stay in politics.
He said while he would like Mr Costello to stay, the former treasurer had earned the right make a decision that was in the best interests of himself and his family.
"I said to him last week, when I had a lengthy chat to him, that I expect he will announce that when he is ready to do so," Dr Nelson said.
