Barack Obama
44th President of the United States, 2009–2017; United States Senator from Illinois 2005–2008
Nothing comes to my desk that is perfectly solvable. … Otherwise, someone else would have solved it. So you wind up dealing with probabilities. Any given decision you make you'll wind up with a 30 to 40 percent chance that it isn't going to work. You have to own that and feel comfortable with the way you made the decision. You can't be paralyzed by the fact that it might not work out.