AP Photo

As the president and his National Security Council privately debate whether to send tens of thousands of troops to war, America's European allies watch with a mixture of anxiety and anguish. They know that if the deployment goes forward, they will be asked to make their own difficult and politically costly contributions of soldiers or other personnel. But they are, if anything, even more worried that the American president will choose a feckless strategy for what they consider a critical mission. And they are frustrated that they must watch and wait -- and wait and wait -- for the president to make up his mind.

"Everyone is waiting for what is going to be decided in the Oval Office, without having any chance to have our say," moans a senior commander in one European...