Is concern over global warming primarily a political issue rather than a matter of science?

There is an interesting chart on the Framing Science blog by Matthew C. Nisbet, Ph.D in a post entitled "The Two Americas of Global Warming Perceptions: Concern Among Dems Rises While Republicans Remain Unmoved" which essentially shows that anxiety over global warming is rising among Democrats, but declining among Republicans. To me, this strongly suggests that so-called "global warming" has largely become primarily a partisan political issue rather than a matter of science.

The comments on the post are interesting as well.

I only ran across this post today, but it does confirm my belief that global warming/climate change has morphed from being an area of scientific research to a hard-core social and political movement that is now almost wholly divorced from the underlying science.

-- Jack Krupansky