Sadly, the loss of that thinking is leading to the collapse of this country.

Roger Dow, president of the Travel Industry Association, told me that the United States has lost millions of overseas visitors since 9/11 — even though the dollar is weak and America is on sale. “Only the U.S. is losing traveler volume among major countries, which is unheard of in today’s world,” Mr. Dow said.

Total business arrivals to the United States fell by 10 percent over the 2004-5 period alone, while the number of business visitors to Europe grew by 8 percent in that time. The travel industry’s recent Discover America Partnership study concluded that “the U.S. entry process has created a climate of fear and frustration that is turning away foreign business and leisure travelers and hurting America’s image abroad.” Those who don’t visit us, don’t know us.

I’d love to see us salvage something decent in Iraq that might help tilt the Middle East onto a more progressive pathway. That was and is necessary to improve our security. But sometimes the necessary is impossible — and we just can’t keep chasing that rainbow this way.

Look at our infrastructure. It’s not just the bridge that fell in my hometown, Minneapolis. Fly from Zurich’s ultramodern airport to La Guardia’s dump. It is like flying from the Jetsons to the Flintstones. I still can’t get uninterrupted cellphone service between my home in Bethesda and my office in D.C. But I recently bought a pocket cellphone at the Beijing airport and immediately called my wife in Bethesda — crystal clear.

I just attended the China clean car conference, where Chinese automakers were boasting that their 2008 cars will meet “Euro 4” — European Union — emissions standards. We used to be the gold standard. We aren’t anymore. Last July, Microsoft, fed up with American restrictions on importing brain talent, opened its newest software development center in Vancouver. That’s in Canada, folks. If Disney World can remain an open, welcoming place, with increased but invisible security, why can’t America?

We can’t afford to keep being this stupid! We have got to get our groove back. We need a president who will unite us around a common purpose, not a common enemy. Al Qaeda is about 9/11. We are about 9/12, we are about the Fourth of July — which is why I hope that anyone who runs on the 9/11 platform gets trounced.