Mongolia was a landlocked, sparsely populated backwater, wedged between two communist states that was mostly made up of nomadic residents. Hard to set up formal relations with such a state.
Hard in the 19th Century maybe, but not really in the latter half of the 20th with telephones and airplanes. The UK was the first western nation to establishment relations, in 1963.
We currently have no formal relations with Bhutan (talk about landlocked), that’s perhaps and even better job for Newt, he could have the honor of being our first Ambassador to take up residence in Thimphu, Callista would love it there, she’d be the blondest resident.
Christie could be Ambassador to Burundi (the world’s hungriest country according to some). Huckabee might be welled suited for another starving country, like the Central African Republic, Eritrea, or South Sudan.