أمة واحدة تحت يهوه (one nation under Jehovah)
Yes, my best and most sincere understanding is the best way to say _it_, would be:
One nation under Yehovah!
Especially, if were true. Sadly, I think Obama was right when he said years ago: this is no longer a Christian nation.
Truth is that claiming to be a nation _under_ Yehovah and then living in most every way contrary to the _way_ of Him, is not being a nation under Him.