Senator Clinton is being consistent here.
She had the same position in 2000 as she does now.
Back then, of course, it looked opportunistic, because it was a way to get the Democrat in.
This time, it almost looks principled: no flip-flop here on her part. Her proposal would handily give the election to Bush. (But, of course, that is exactly the result she wants...)
Look again - this is an article from 2000. To my knowledge she hasn't repeated it this year.