Cross-posted at River Twice Research.

The economic relationship between China and the United States is the defining issue of our day. While debates over health care are vital to American society, and while challenges ranging from Iran to Afghanistan to North Korea are real, nothing will determine the arc of the coming decades - or will shape domestic life and prosperity in the United States - more than the emergence of China as a global economic superpower unrivalled except by America.

The rise of China is hardly a secret, but because it is a complex economic that is constantly evolving, it gets less attention than hot-button issues. Absent a real crisis between the two, the relationship is more about the flow of capital and the nature of global business than it is about heated battles inside the Beltway or on Main Street. And while the rise of China and America's increased dependency on Chinese loans to fund its deficits certainly generates anxiety, it's mostly amorphous barring some specific issue to focus it.

How that relationship came to be is the subject of my new book, Superfusion: How China and America Became One Economy and Why the World's Prosperity Depends On It. While this economic fusion has taken more than two decades to evolve, with the crisis of the past year, it has become both a tighter embrace and one more fraught with tension. It's to the credit of both governments - for now - that those tensions have not boiled over.

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Cross-posted at River Twice Research.

While Washington is glued to the drama over health care, over the past few days, Russian Prime Minister Vladimir Putin has been in Beijing meeting with Chinese leaders including Premier Wen Jiabao and President Hu Jintao. In a series of communiqués, they celebrated the "strategic partnership" between the two countries and charted a course of future close relations.

Among others things, Putin - Russia's man behind the curtain who has also been spending considerable time in front of the curtain - signed off on six billion dollars worth of trade deals Chinese counterparts, including moving ahead with a natural gas pipeline to open up the vast Chinese market to Russia's equally vast supply of natural gas. The two sides also discussed policies to contain and manage North Korea. Trade between the two countries is approaching $60 billion a year, and while that is a faction of the more than $300 billion a year between China and the United States, it is hardly negligible.

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