Jennifer Jacobs of Bloomberg says she has information that Donald Trump called Mitt Romney to inform him, he was not going to be Trump’s choice for Secretary of State:

Scoop: Trump called Romney to tell him he's not getting post, I'm told.
Pres-elect expressed nothing but respect for him in recent days.

— Jennifer Jacobs (@JenniferJJacobs) December 13, 2016

This certainly means Donald Trump is prepared to dig in and fight for Rex Tillerson unless Trump completely surprises everybody tomorrow morning:

I will be making my announcement on the next Secretary of State tomorrow morning.

— Donald J. Trump (@realDonaldTrump) December 13, 2016