"Gordon Brown: I will go on and on."
The story behind the quote, which you can read here, is that the Prime Minister has told colleagues he will refuse to quit as Leader of the Labour party after the general election unless that election results in a Conservative majority of more than 20 seats.
So Brown is effectively telling any voter who wants to see a change in the leadership of the Labour party that the only way to make certain of this is for the Conservatives to win a healthy majority.
This may be even less helpful to Labour than Margaret Thatcher's "I hope to go on and on" remark was to her - at least Mrs T had won three elections when she said it.
It is often said that "All political careers end in failure" and knowing when to step down is one of the most difficult decisions for any political leader. In my lifetime the only Prime Minister who went at a time of his own choosing was Sir Harold Wilson and the only Conservative leader in the past forty years who managed his departure successfully was Michael Howard.
As the saying goes, those who learn nothing from history are doomed to repeat it.