sentences:  On 13 April, Brown met US President George W. Bush for the first time, in a reportedly amicable discussion.On 15 April he encouraged rivals to "bring it on", in response to numerous reports suggesting that he would face three or four contenders for the leadership.David Miliband declared on 17 April that he would not be a candidate for the Labour leadership or Deputy leadership, and had not wavered in his position on that issue in the past three years.