Why has the administration’s flagship foreclosure prevention program been so ineffective in helping struggling homeowners get loan modifications and stay in their homes? One reason: The government’s supervision of the program has apparently ranged from nonexistent to weak. Documents obtained by ProPublica – government audit reports of GMAC, the country’s fifth largest mortgage servicer – provide the first detailed look at the program’s oversight. They show that the company operated with almost no oversight for the program’s first eight months. When auditors did finally conduct a major review more than a year into the program, they found that GMAC had seriously mishandled many loan modifications – miscalculating homeowner income in more than 80 percent of audited cases, for example. Yet GMAC suffered no penalty. GMAC itself said it hasn’t reversed a single foreclosure as a result of a government audit.