Are the Democrats Cowardly or Retarded?

Or is there something here that I do not understand?

Why, in the name of Your Dear and Fluffy Lord, would the Democrats not want to push for a vote for extending the Bush tax cuts for the middle class and below? Why would they not want to put the party of the Confederacy on the spot of having to either say "OK" or obstruct everything because the rich aren't getting their tax cuts extended.

But the Democrats are, apparently, not willing to push that vote.