Senate Minority Leader Mitch McConnell (R-Ky.) said Sunday that the Obama administration "kind of made up a tale" about the Sept. 11, 2012 attack on the U.S. outpost in Benghazi, Libya, that claimed the lives of four Americans, including Ambassador J. Christopher Stevens.

"We know there was inadequate security. We know an American ambassador and three other brave Americans got killed.  And we know the administration kind of made up a tale here in order to make it seem like it wasn't a terrorist attack.  I think that's worthy of investigation, and the investigations ought to go forward," McConnell said on NBC News's "Meet The Press."

At issue are talking points the administration used after the attack. United Nations Ambassador Susan Rice initially called the attack a spontaneous assault. Later, the Obama administration said it was an act of terror.

White House senior adviser Dan Pfeiffer said Sunday that e-mails the Obama administration released last week prove that Republican charges that the administration played politics are false.

'What they absolutely show beyond a shadow of a doubt is that the Republican allegations that the White House, the State Department, someone else changed the CIA’s assessment for political reasons -- that has proven without a shadow of a doubt to be false," he said on ABC News's "This Week With George Stepahnopoulos."

McConnell didn't go as far as some Republicans who have suggested Obama should face impeachment over the matter, but said the investigation should examine whether politics was a factor.

"It's very clear that it was inconvenient, within six weeks of the election, for the administration to, in effect, announce that it was under a terrorist attack. I think that's worth examining. It is going to be examined," he said.