Fox News senior political analyst Brit Hume on Sunday lashed out at mainstream media organizations for not spending as much time as Fox News trying to determine what mistakes the Obama administration made before and after the Sept. 11 attacks in Benghazi, Libya.

"One of the problems we're having here is that it has fallen to this news organization, Fox News, and a couple of others to do all the heaving lifting on this story," Hume complained to Fox News host Chris Wallace. "And the mainstream organizations that would be on this story like hounds if there were a Republican president have been remarkably reticent."

"There's been some good reporting but nothing on the scale and to the degree of specificity that you would expect by now," he continued. "Normally, the big news organizations would have this thing out there and we would know a lot more than we do about what the president did, what he knew, when he knew it, when he made what order he made and on what basis. We still don't know that and to some extent, a lot of the media who are a combined potent force have not done their job."

But on Friday, Fox News host Geraldo Rivera encouraged his colleagues at the network to stop the “politicizing” and “preposterous allegations” about President Barack Obama’s response to the attacks that killed four Americans in Libya.

“People, stop," Rivera urged the hosts of Fox & Friends. "I think we have to stop this politicizing. ... [T]hese preposterous allegations –- reckless allegations that paint a picture of some fat bureaucrat watching TV –- I think that’s really beyond the pale."

Watch this video from Fox News' Fox News Sunday, broadcast Oct. 28, 2012.