The US House Committee on Oversight and Government Reform has held hearings on the accusations that the White House has been "asserting it's will" on climate science. What they've found is that it's true, there are documented cases of so called 'editing' by White House aides. The goal of this editing process is to filter the information from the scientists in order to align it with the policies of the Bush administration before the information reaches the public.
One of the defenders of the practice, Phil Cooney who was the chief of staff at the White House's Council on Environmental Quality and now conveniently works for ExxonMobile. So what were the specifics? In 10 years, 181 edits to highlight scientific uncertainties, 113 edits to diminish the role of humans in climate change.
Here's an example from the New Scientist article (which I encourage everyone to read):
For example, Cooney replaced "will" with "may" in the sentence: "Warming temperatures will also affect Arctic land areas." He also deleted this sentence: "Climate change has global consequences for human health and the environment." [New Scientist Environment, 2007]
Is this the way America conducts scientific research now? It's certainly not the behavior of the America I was raised to love.
US fudging of climate science - details revealed - [New Scientist Environment]