[petercooper]

I'm not sure China would care. They'd just become the second superpower (which, I would argue, they already are). Their economy is much larger than Russia's, their trade relations diverse (the US isn't even their #1 trading partner), their land more habitable (though smaller), their technology better, they have a large army and nuclear arsenal, and they're in an ideal location to put up significant resistance against US incursions.

[mpyne]

Plus China is in a great position geologically (if that makes sense). The Asia-Pacific region is only going to get more important as the years go on, and China is right in the thick of it all, while Russia is camped out with Siberia.

Who knows though, once the Arctic ice sheets melt maybe that position will become more important than it appears.