That is a valid point, and it has crossed my mind. Generally spekniag, the Clintons are shrewd politicians and I’m sure they know the numbers are against Hillary. Her attacks on Obama have become weaker (or less reported, I’m not sure which), so it is possible that she’s still in the race as a publicity boost for the Dems.
...A Mental Squint 
That is a valid point, and it has crossed my mind. Generally spekniag, the Clintons are shrewd politicians and I’m sure they know the numbers are against Hillary. Her attacks on Obama have become weaker (or less reported, I’m not sure which), so it is possible that she’s still in the race as a publicity boost for the Dems.