Attack the donks, they passed the bill. GW had nothing to do with it. Attacking the president is only helping Pelosi, unless that is what you are intending to do.
No, recognizing a bad move doesn't help the dems... The veto was a good move, and to a certain extent blaming "pork" MAY prevent dems from trying again, as they had to bribe big time pork barrel stuff to bring the blue dogs big time to sign on to this ghastly bill.
Unfortunately though, by evening mentioning Pork as a reason, the Pres has set himself up for more criticism, because up until this bill he hasn't met a pork barrel he's hasn't liked.
Pointing out a possible political mistep is an honest assessment of the situation, and it is only through honest assesment of situations can any progress be made. Blind following does no good.