This is pretty damning:

An extensive online questionnaire responded by 1600 EPA staff scientists who have worked in the agency for more than 10 years has determined that they have been pressured to skew their findings. The survey included chemists, toxicologists, engineers, geologists and experts in other fields of science. About 40% of the scientists have reported that the interference has been more prevalent in the last five years compared to previous years.
To quote DD: Bush! Bush! Bush!