Democrats make promises to get elected. Once it's too late they claim things have changed and they cannot do what they said they'd do. Clinton famously did it, Corzine in NJ did it, and even Ken Salazar in CO did it.
It's a pattern to get votes without having to be held accountable.
Yep! Remeber how Mary Landrieu ran ads in Spanish about she wouldn't filibuster Miguel Estrada, then after the election claimed that was a (convenient) mistake by her campaign underlings?