The thing is while I get the Obama = Carter meme is popular since that was the last Democratic President who was an abject failure, there really aren't much points of comparison at all. The characteristics of the Carter administration (in popular perception) were rising unemployment, a disastrous foreign policy, out of control inflation and a complete lack of legislative accomplishment. How do any of those match up with the current incumbent? 
I've been listening to conservative talk radio a fair amount lately, and one of the biggest things they tend to push about Obama (besides the "radical socialist who is destroying America" bit) is the fabrication of parallels between him and Carter. It's very widespread.
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