How long is your political memory?

Given that Obama ran on a platform of change in 2008, one of the things that has been most interesting to me about this year’s crop of political ads is the framing used by Republicans.  I’ve seen a number of ads noting how incumbents have been “responsible” for skyrocketing unemployment.  I’ve also seen a number of ads mentioning the “failed stimulus.”  In some cases, it seems that candidates are saying, “Remember what  you voted for in 2008?  Well, some people have actually been trying to do those things.  It is time to vote them out!”  In response to this rhetoric, I wonder why more candidates haven’t taken the approach of this campaign ad from the International Brotherhood of Boilermakers: