I think Kellyanne is acting on Trumps order. Maybe it's a trial balloon.
I can see why Trump would be interested in Mittens.
If you consider that both men are successful businessmen and take a businessman's approach.
Politicians always see issues from a political point of view. Warriors strategize in terms of battles. Religious leaders view the world through a religious prism. Diplomats will be diplomats.
I think Trump is viewing the SOS position as having great economic potential. Sort of a super secretary of commerce.
Instead of having a Kerry type out there negotiating global warming treaties or giving away the farm to our enemies we could have an economics minder businessman uncovering opportunities. There could be lower level bureaucrats doing the diplomatic two step. Diplomacy is mostly directed out of the White House anyway.
Bet on it.