As Republican Rep. John Shimkus turned his line of questioning of Secretary Kathleen Sebelius to coverage of abortion procedures, one of his colleagues on the House Energy and Commerce Committee made her opinion of the question obvious. "Oh, here we go," she said, captured by a live microphone.

Shimkus: If someone, a constituent of mine or someone in this country has strongly held pro-life views …

[Voice]: Oh, here we go.

Shimkus: … can you commit to us to make sure that the federal exchanges that offer that are clearly identified so people can understand if they're going to buy a policy that has abortion coverage or not?

So whose voice was it? One possibility: Rep. Anna Eshoo of California, who preceded Shimkus in questioning Sebelius, and who may have not switched off her microphone. It probably wasn't Shimkus' mic picking up someone near him; the speaker was almost certainly a Democrat, given the response, and Shimkus was seated far from any members of the opposite party. It wasn't Sebelius either. The video shows that Sebelius (wisely) kept her mouth shut, except to respond to Shimkus' question when complete.

It's clear that the comment was unintentional. But while only one person said it audibly, it seems likely that the speaker wasn't the only Democrat with that involuntary response.