Hostile Take Over

Jackie, a highly successful bank manager in Minneapolis has been having trouble at her job ever since the bank was bought out by its competitor.  She was shocked by the take over, and felt betrayed that she hadn't been let in on the plans before they were announced to all of the employees. She has based much of her career identity on the fact that she works for a local bank that supports the community. 

Now she walks around the office with a chip on her shoulder.  She seems short tempered, and is outwardly sarcastic about the new ownership, even in front of customers or employees of the other bank, who are now her colleagues. The branch manager sat down with Jackie and attempted to let her blow off steam about her feelings.  This only seemed to fuel her feelings and justification for her behavior. 

What would you do?