Everything the Dems do is political first, national interest second (or fourth, or ninth, or whatever).
My guess is that he's trying to show that the Dems are not lockstep in their obstructionism, opening the door for an "honest debate" that doesn't pin ANYTHING on Daschle or the Dems as a party ("Hey...one of our leading guys is with the Prez on this!")
I can hear it now.