Exxon Mobil XOM, -1.61% was fined $2 million by the Treasury Department for violating Ukraine-related sanctions - when the company's CEO was Rex Tillerson, now the U.S. secretary of state. The Office of Foreign Assets Control said the presidents of its U.S. subsidaries signed legal contracts with Igor Sechin, the president of Rosneft. Exxon says the fine was "fundamentally unfair" and that it followed the "clear guidance" from the White House and Treasury Department because the activity related to Rosneft's business and not Sechin's personal business. (Updates to include Exxon's reaction.)