The Times-Picayune is reporting that Sen. Mary Landrieu on Friday issued the results of an internal investigation that uncovered $33,700 in campaign flights that were charged to her Senate account.

Landrieu blamed sloppy book keeping for the controversy:

“The review I ordered last month found these mistakes stemming from sloppy book keeping. I take full responsibility. They should have never happened, and I apologize for this,” Landrieu said“A new system has been established that has been successfully used by a number of senate offices to provide a safeguard from this happening in the future.”

RNC communications director Sean Spicer was quick to jump on the news.

RNC spokesman Michael Short told National Review Online it was no mistake that Landrieu let her self-imposed deadline of Sept. 8 pass before releasing the report. “With at least 9 more potentially illegal taxpayer-funded charter flights in question, it’s clear why Senator Landrieu decided not to release her report on time,” he said. “These flights suggest a longstanding pattern of abuse of taxpayer dollars dating back to her first term in office – not a bookkeeping error – and a strong contempt for hardworking Louisiana taxpayers”