
Now, there could be many reasons for is. Here are two I can think of:
1. Fox really has it out for the Democrats and showing anything positive from the Obama Administration is a no no.
2. The graphic designers are complete idiots.
While I’d like to believe this is an honest mistake, clear and continuous evidence shows the opposite. We are talking about a news organization whose mantra is so honed, so controlled. Speaking as a graphic designer, I have never in my career built a graph without some type of software, especially where the data increments are in the decimals. And no software I’d use would create such a skewed result such as this.
Here is a more accurate version of the graph:

I can picture the Conversation:
Designer: “Here are the graphs you requested according to the data you sent me.”
Director: “Hmm, yeah, can’t have that. Policy. Make the last dip in the graph as subtle as possible… like… this.” (draws straight horizontal line)
Designer: “Really?, um… ok”
…shows new graph…
Director: “Perfect!”
Fox News: Fair and Balanced
via Graphic Design the Fox News Way » Sociological Images.