The chairman of the House Oversight Committee has accused the Obama administration of knowingly withholding relevant documents from Congress on the Benghazi attack.

"We have received over 3,200 new documents, many of which have never been seen before outside of the administration," said California Republican Darrell Issa.

Opening a hearing, Issa said the administration has consistently misled Congress about the terror attack on the U.S. consulate in Libya.  

"The President himself told the American people in November of 2012, 'every bit of information we have on Benghazi has been provided," he said.

Issa said the administration's behavior has been Nixonian in nature, a reference to the Watergate-era scandal that led to the downfall of President Richard Nixon.  Four Americans were killed in the 2012 attack, including U.S. Ambassador Christopher Stevens.