I put suspsect nation, as we have not (at least i don't know about) seen them moving large masses of troops around near our borders, but they are obviously interested in the same territory we are. They are not openly hostile, but they are obviously 'in the way'. Still, we almost certainly will go to war with them in the next... oh 40 turns at the most, (whenever we have a military really) unless by some chance Old Sarai flips.
All hail Manifest Destiny! We shall wipe the Mongolian scourge from our land!