Hudson Institute senior fellow Rebeccah Heinrichs discusses President Donald Trump’s reaction to the Iranian supreme leader’s warning of a 'regional war' over a potential U.S. attack on ‘Fox & Friends.’

There’s one superpower that dominates the planet again, and it’s the United States.

In just one year in office, President Donald Trump has catapulted the U.S. from a country that seemed on the brink of inevitable decline, into the American colossus that’s put the other great powers — especially China and Russia — in the shade, and now determines the tempo and direction of world events.

What happened in Davos should set aside any doubts. In 24 hours, President Trump turned worldwide panic about possible U.S. military intervention in Greenland into worldwide relief with a framework for peacefully securing the giant island for generations to come.

We were the world’s "sole superpower" twice in the 20th century, right after World War II and again after the Cold War. Now, thanks to Donald Trump and his administration, it’s happening again in the 21st century. It’s important to understand why and how, and what it means for the future.

THE DONROE DOCTRINE: TRUMP IS REWRITING POWER POLITICS TO PUT AMERICA FIRST

There are three components that make a dominant world power: military strength, economic strength and bold leadership.

Military power: By taking out the........

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