Paul Waldman explains why Republicans have gone batshit crazy over Benghazi:
So what's going on here? I can sum it up in two words: scandal envy. Republicans are indescribably frustrated by the fact that Barack Obama, whom they regard as both illegitimate and corrupt, went through an entire term without a major scandal. They tried with "Fast and Furious," but that turned out to be small potatoes. They tried with Solyndra, but that didn't produce the criminality they hoped for either. Obama even managed to dole out three-quarters of a trillion dollars in stimulus money without any graft or double-dealing to be found. Nixon had Watergate, Reagan had Iran-Contra, Clinton had Lewinsky, [and don't forget that Bush had the Plame affair and the Abramoff scandal! –ed] and Barack Obama has gotten off scott-free. This is making them absolutely livid, and they're going to keep trying to gin up a scandal, even if there's no there there. Benghazi may not be an actual scandal, but it's all they have handy.
Yep. They're just convinced that Obama runs a gang of Chicago thugs who are lying and cheating behind the scenes at every opportunity. It's a foundational story on the tea-party right. Unfortunately, the reality is that whatever else you think of Obama, he's one of the straightest arrows we've had in the White House since....forever. He runs a tight ship organizationally, and on a personal level he's so intolerant of personal peccadilloes that he sometimes seems almost inhuman. It would be astonishing if he could actually avoid a serious scandal for an entire eight-year term, but if anyone can do it, it's probably Obama.
And yes, it's driving Republicans crazy. Even the ones who don't want to impeach him at least want to bring him down to earth a bit. So they latch onto anything they can. It's all starting to seem kind of desperate, but I doubt they're going to let that stop them. After all, it eventually worked against Clinton.