American boot prints in moon dust. That’s the legacy of John F. Kennedy. Putting an American on the moon wasn’t preordained. It was a wild notion presented to the American people. That’s how effective presidents operate. They traffic in ideas. They build coalitions behind them. They insist on change and galvanize majorities to achieve it. They dare. They challenge. They persuade and inspire. To successfully lead from the White House, a president must sell his ideas, both to the American people and to their elected representatives.