Courtesy helpful reader Rob, from an article in the current Washington Monthly by Nicholas Thompson, "Science Friction: The growing - and dangerous - divide between scientists and the GOP":

Any administration will be tempted to trumpet the conclusions of science when they justify actions that are advantageous politically, and to ignore them when they don't. Democrats, for instance, are more than happy to tout the scientific consensus that human activity contributes to climate change, but play down evidence that drilling in the Arctic National Wildlife Refuge (which they oppose) probably will have little impact on the caribou there. But Democrats will only go so far down the path of ignoring scientific evidence because they don't want to alienate their scientific supporters. Increasingly, the Republicans feel little such restraint. Hence the Bush administration's propensity to tout scientific evidence only when it suits them politically. For instance, though numerous studies have shown the educational benefits of after-school programs, the Bush administration cited just one recent report casting doubt on those benefits to justify cutting federal after-school funding. Meanwhile, the White House has greatly increased the federal budget for abstinence-only sex education programs despite a notable lack of evidence that they work to reduce teen pregnancy.