WASHINGTON - -- He was appointed with fanfare as the public watchdog over the government's multi-billion dollar bailout of the nation's financial system. But now Neil Barofsky is embroiled in a dispute with the Obama administration that delayed one recent inquiry and sparked questions about his ability to freely investigate. The disagreement stems from a claim by the Treasury Department that Barofsky is not entirely independent of the agency he is assigned to examine ¿ a claim that has prompted a stern letter from a Republican senator warning that agency officials are encroaching on the integrity of an office created...