STILL WAITING…. Of the four candidates for national office, Sarah Palin is the only one who refuses to release any of her medical records. A couple of weeks ago, her spokesperson said Palin wouldn’t even answer questions on the subject.

It came as something of a surprise, then, when Palin indicated to NBC News’ Brian Williams last week that she would release her medical records. She used ambiguous language, though: “If that will allow some curiosity seekers perhaps to have one more thing that they either check the box off that they can find something to criticize or to rest them assured over. I’m healthy, happy, I’ve had five kids, that’s going to be in the medical records, never seriously ill or hurt, you’ll see that in the medical records if they’re released.”

We’re still waiting.

Governor Palin’s campaign still has not released any information regarding her medical records despite frequent requests from the news media and the campaign’s own assertion that they would release this information soon.

On Sunday morning, Palin spokeswoman Tracey Schmitt told ABC News that the campaign had planned to release information on her medical history early this week…. ABC News has asked every day this week about the status of the release of information and received no updates from the campaign. It is unclear what is holding things up.

“We are working on this and it will happen sooner than later,” Schmitt said on Sunday.

The election is just a few days from now. Even if there were some logistical delays, such as having materials mailed in from Alaska, Palin did tell a national television audience she’s release the records nine days ago. So, where are they? What’s the hold up? Given Palin’s background and ethical lapses, it’s not unreasonable to find it discomforting when she acts like she has something to hide.

My hunch is, there isn’t anything especially controversial in the records, and Palin is probably just being secretive for the sake of being secretive.

Besides, McCain and his aides probably got a detailed briefing on Palin’s medical history as part of the extensive vetting process, right?

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Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.