Personal obligations and speaking engagements. The Dems are going to bleed her until they have as much as they can get.
She is free to set herself up for the fall.
I believe that cindy has been told by her handlers that things are now getting nasty and to make herself scarce..this means she doesn't have to personally confront the opposition, but can continue to fire shots from a safe distance..she's become the general in the lefts battle and those going on the busride to washington are the privates..she's safe from criticism (face to face), and now will only show up when she has troops stationed in front of her..
I also firmly believe, as do many others, she's in for a shock when her day in the sun comes to an end..regardless how much she's going to make from her book deal (believe me it's coming), or the movie (believe me that's coming too), I think she wants the limelight more than anything..when it goes away and she's left by herself, the world will quickly forget she even existed..except for Bin Laden..I understand he has a crush on her since she's better looking (marginally) than the camel he's been recently dating..:)