I have in sincerity pledged myself to your service as so many of you are pledged to mine. Throughout all my life and with all my heart I shall strive to be worthy of your trust.

Jessica Simpson is the youth ambassador for Operation Smile and an episode of The Apprentice featured a team managing a charity concert she put on. Donald Trump came on stage and pledged a donation.

He would see civilization in danger of perishing under the oppression of a gigantic paradox: he would see multitudes of people starving in the midst of plenty and nations preparing for war although pledged to peace.

True leadership lies in guiding others to success. In ensuring that everyone is performing at their best doing the work they are pledged to do and doing it well.

Although... the Chief Magistrate must almost of necessity be chosen by a party and stand pledged to its principles and measures yet in his official action he should not be the President of a party only but of the whole people of the United States.

Climate change was a point of division between Obama and Republican rival Mitt Romney. The president declared climate change a global threat acknowledged that the actions of humanity were deepening the crisis and pledged to do something about it if elected.