“America is open for business, and we are competitive once again.” That was just one of the key lines in President Trump’s highly successful Davos speech this week.

Of course, in going to Davos, Mr. Trump entered the lion’s den. A year ago such a visit would have been a poor idea. Back then, elitist heads of state, the European Union bureaucrats, and the international chief executives were uniformly against Donald Trump.

But Mr. Trump’s 2018 Davos strategy was a brilliant stroke.

A year later he could make the fact-based argument that, in his words, “The world is witnessing the resurgence of a strong and prosperous America.”

And the core of his message was this: “There has never been a better time to hire, to build, to invest, and to grow in the United States.”

He’s right.

In just one year, the president’s policies have begun to restructure the American economy. We’ve moved from “secular stagnation” (i.e., high taxes, massive regulation, huge government spending, and a disdain for business and investors) to a new private-sector incentive system that rewards success.

By slashing individual and corporate tax rates, providing 100% immediate expensing for plants and technology, and making it easy for big companies who fled our high-tax system to bring the money back home, he has ended the war against business and investment.

And it has happened faster than anyone imagined possible.

More than 250 American companies have announced gigantic investment projects, paid sizeable bonuses to their workforces, increased 401(k) contributions, and raised corporate minimum wages and other benefits.

Now, a roaring stock market, generating $7 trillion in new wealth, provides the only realistic chance of bailing out excessive government-union pensions and benefits — even though these very unions totally opposed Mr. Trump’s corporate tax reform.

Ankle-biting Democrats say, “Rising business profits will go to shareholder buybacks.” As if that were a bad thing. Meanwhile, new money is circulating throughout the economy to start new companies and re-oxygenate the system.

Didn’t Apple just announce $ 350 billion in new investment projects?

Democrats say the incredible business response to tax reform is nothing more than one-time crumbs for workers. Didn’t Walmart, which has bitterly fought attempts to raise the federal minimum wage, just raise its internal minimum wage for virtually all its wage earners, give bonuses of up to $1,000, expand maternity and parental leave, and commit $5,000 to every employee who adopts a child?

That’s permanent, as are increased retirement-fund contributions.

The post-tax-and-regulatory reform policies of the Trump administration have barely been put in place, yet they’re already benefiting working folks around the country. These are people who have barely had a raise in 20 years.

Mr. Trump’s critics belittled the idea that corporate tax cuts could actually increase wages. But in faster than a New York minute, several million wage earners have already benefited.

Then there are the know-it-all critics who say there’s no academic evidence to support the view that business taxes matter for the workforce.

Yet peer-reviewed papers — from respected economists Alan Auerbach, Laurence Kotlikoff, and the Romer family — conclude that higher after-tax returns to capital generate investment. I’ve been saying this for a long time. With more capital behind each worker there’s greater productivity. New investment projects raise the demand for workers and their wages.

Don’t forget the president’s argument about the importance of regulatory reduction. “Regulation is stealth taxation,” Mr. Trump said — repeatedly — in Davos. “We are freeing our businesses and workers so they can thrive and flourish as never before.” Don’t forget that the Trump tax bill ended the Obamacare individual mandate and opened the door to energy drilling in the Arctic National Wildlife Refuge.

Then, in Davos, the president offered a fantastic point on the so-called debate over globalism and trade: “As president of the United States,” he said, “I will always put America first, just like the leaders of other countries should put their countries first also. But America first does not mean America alone.” [Italics mine.]

In an illuminating interview with my friend and CNBC colleague Joe Kernan, Mr. Trump said he’s willing to deal on trade — including NAFTA, and perhaps the Trans-Pacific Partnership. He correctly insisted, though, on reciprocity. Barriers should be torn down by both sides. Arbitrations must protect America, not penalize it.

“I’m a free trader,” he said. “A fair-trader. But there must be reciprocity.”

He also told Mr. Kernan that the American dollar will strengthen based on America’s resurgence and that it will remain the world’s reserve currency.

So, “America First” came to Davos, and to all the multilateral globalists and multi-nationalist elites. These CEOs, bureaucrats, and academics listened carefully to Trump’s words.

Success has a thousand fathers, but defeat is an orphan.