In the latest sign of the revolving door between the U.S. government and Wall Street, former Treasury Secretary Timothy Geithner has secured a personal line of credit from JPMorgan Chase—one of the banks he was previously charged with overseeing—in order to help fund his new endeavors in private equity. Geithner is reportedly borrowing the money to invest in a $12 billion fund being raised by his current employer, the private equity firm Warburg Pincus.