Weak oversight of Obamacare’s state-based exchanges has led to millions of dollars in wasteful spending, according to a report released Tuesday by the House Energy & Commerce Committee.

“Neglecting to limit the dollars granted to [states] and inadequate oversight of documented wasteful spending has cost the American taxpayer millions of dollars,” the report said. “Six years into the implementation of [the Affordable Care Act], it is time that the administration strengthen its measures to account for the significant waste of taxpayer dollars.”