In an “Action Request” memo obtained by The New York Times, Mr. Rubio said that switching back to the use of Times New Roman would “restore decorum and professionalism to the department’s written work.” Calibri is “informal” when compared to serif typefaces like Times New Roman, the order said, and “clashes” with the department’s official letterhead.
As far back as I can recall, this is a politician who has railed against 'political correctness'.