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Barack Obama is caught in a Catch-22 situation: If America's wars in Afghanistan and Iraq fail, they will overshadow any of his domestic achievements. The end game in the leadership role of the United States in the world began long ago. Can the Afghanistan conference deliver a breakthrough?

I. There is a name that is now being mentioned frequently in the debate over America's wars, a name that does not bode well for US President Barack Obama: Lyndon B. Johnson, the 36th president of the United States. Johnson, who, like Obama, was both a Democrat and an energetic reformer, ultimately failed because of an overseas war being fought by US troops. The Vietnam War prevented Johnson from being remembered as one of the most prominent US presidents in the history of...