If China invades Taiwan to unify it with the mainland, the United States will go to war to defend Taiwan and send U.S. troops to fight the invaders.

That is the commitment made last week by President Joe Biden.

Asked by CBS's Scott Pelley on "60 Minutes" if the U.S. would fight in defense of Taiwan if China invaded, Biden replied, "Yes, if, in fact, there was an unprecedented attack."

Pelley followed up: "So, unlike Ukraine, to be clear, sir, U.S. forces -- U.S. men and women -- would defend Taiwan in the event of a Chinese invasion."

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A desperate Vladimir Putin is a dangerous Vladimir Putin, and there are signs Putin's situation in Ukraine may be becoming desperate.

In the last week, the Russian army in the Kharkiv region of Ukraine was driven out of some 2,200 square miles of territory, according to the Ukrainians, whose soldiers are now two miles from the Russian border.

The Kharkiv battle was a rout for the surprised Russians who tore off their uniforms, threw down their weapons and fled, some on stolen bicycles. For Russia, it was the worst defeat of the war.

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Speaking at a San Francisco fundraiser in 2008, Barack Obama sought to explain the reluctance of working-class Pennsylvanians to rally to his cause.

"You go into these small towns in Pennsylvania and ... the jobs have been gone now for 25 years, and nothing's replaced them."

"And it's not surprising, then, they get bitter, they cling to guns or religion or antipathy to people who aren't like them or anti-immigrant sentiment ... as a way to explain their frustrations."

Translation: The world has left Middle America behind, and Middle America has reacted by clinging to its bibles, bigotries and guns.

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"There never was a good war or a bad peace," wrote Ben Franklin at the end of the American Revolution.

But that depends on the war-makers and the causes for which they fight.

Six months into the war in Ukraine, launched by Russian President Vladimir Putin on Feb. 24, when he could not get the U.S. or Kyiv to rule out admission of Ukraine to a NATO alliance aimed against Russia, who appear to be the winners and who the losers?

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In the aftermath of Russia's invasion of Ukraine, President Joe Biden declared to the nation and world: "We are engaged anew in a great battle for freedom. A battle between democracy and autocracy."

On her trip to Taiwan, Speaker Nancy Pelosi echoed Biden: "Today, the world faces a choice between democracy and autocracy. America's determination to preserve democracy here in Taiwan and in the world remains iron-clad."

But is this truly the world struggle America is in today?

Is this the great challenge and threat to the United States?

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