Bush meltdown continues

Bush's approval in the Republican run Rasmussen poll has fallen again to another new alltime low:

After three straight days at the lowest level ever recorded by Rasmussen Reports, President Bush’s Job Approval ratings slipped another point to another new low on Tuesday.

Just 33% of American adults now Approve of the way that George W. Bush is performing his duties as President. Prior to this past week, the President’s ratings had never slipped below 35% and had only reached that level for a day or two at a time. Now, his Job Approval has been at the 35% level or below for six straight days.

So, explain to me why the Democrats aren't being more aggressive.