Neither is Pakistan, it is in Asia. I suspect China is more unified than the US, from what I have seen lately.
It will be an alliance of the willing: USA, UK, Israel, India, Russia and maybe some minor NATO countries like France.
I knew India did. Russia is going to do what is best for Russia, and although they appear to be friendly, are actually bigger enenmies of the US than China. If you think Russia is going to assist the US, I have some swampland to sell you in Florida.
Russia is likely to give support to India, who in turn will support the USA i.e. Russian support is indirect, but it is still support.