HONG KONG — The pomp and circumstance marking President Hu Jintao's arrival in Washington could define a dangerous moment in relations between the United States and China. Political hype and pressures could easily poison the atmosphere and prevent progress on the proliferation of business, economic and financial issues dividing the two countries, not to mention perilous questions like the nuclear threat from North Korea, nuclear proliferation generally and China's military buildup.

Former U.S. Secretary of State Henry Kissinger's warned in an opinion article in both the New York Times and the Washington Post of the danger of a new "cold war" mentality. The fallout would be damage to both countries and to global security and economic well-being.

The timing is not auspicious. President Barack Obama suffered a humiliating rebuff in the November congressional elections and Republican opponents are baying for his blood, seeking his ousting next year as their main agenda. It would be easy for Hu to perceive Obama as just as weak and vulnerable politically as the U.S. is economically sclerotic, and to block progress except for mealy-mouthed words of friendship in the communique.