Joining from Merrill, a division within Bank of America, Campbell was based out of San Francisco and brought with her almost $1.4b in client assets and loans, including hundreds of millions of dollars from Alex Rodriguez. Just over a year since joining JPMorgan, however, things have soured. The situation has devolved into a legal dispute between the bank and Campbell, who is arguing that her new colleagues have been trying to poach her billionaire and multimillionaire clients, with Rodriguez the main target.