Obama is set to depart Friday night on a five-day trip to Brazil, Chile and El Salvador — his first journey in the Americas south of Mexico. But with the crises brewing elsewhere, few outside the region may notice.

Today, with popular revolutions upending the political order in the Middle East, an unprecedented natural disaster devastating Japan, and his own government hovering on the verge of shutdown, it may seem odd to many that U.S. President Barack Obama is choosing to embark on a five-day tour of a region often considered an afterthought in international politics.

Each president of the United States enters office thinking he will be able to define the agenda and set the course of America’s relations with the rest of the world. And, almost invariably, each confronts crises that are thrust upon him—wars, revolutions, genocides, and deadly confrontations.

According to a U.S. State Department official, the concept of “smart power” ― the intelligent integration and networking of diplomacy, defense, development, and other tools of so-called “hard” and “soft” power ― is at the heart of the Obama administration’s foreign-policy vision. Currently, however, Obama’s smart-power strategy is facing a stiff challenge from events in the Middle East.

As revolution has spread from the Maghreb to the Gulf region and back again, President Barack Obama has stuttered and fumbled and sometimes fallen strangely silent. What can explain this from a man whose manner has always been smooth and whose oratorical gifts propelled him from utter obscurity to the White House in just four short years?

It's too early for President Barack Obama's administration to formulate a new long-term strategy for the Middle East; no one knows what it will look like six months hence, or for that matter, next week. But it's already clear that the Middle East which Obama addressed in his Cairo speech in June 2009 no longer exists, and thus that the premises of the strategy behind that speech no longer apply.

The Middle East is once again on fire, not because of American warfare, but due to apparently genuine movements aiming to get rid of old rulers and obsolete political systems. Tunisia, Egypt, Libya, Bahrain, and Yemen have all either passed the threshold of revolution or are on the verge. The dominos have fallen and it would not be imprudent to call it a day for rulers in other Arab countries like Saudi Arabia, United Arab Emirates, or Jordan.

Unfortunately, Euro-pessimism is on the rise in the United States.