DES MOINES, Iowa (AP) -- Mixing science and politics, Nobel laureates and former presidential advisers are heading to campaign battleground states with a message that George W. Bush is no friend of scientists and should be replaced by John Kerry. "They feel strongly that President Bush has used ideology to distort scientific integrity in energy policy, the environment, global warming, AIDS politics, bioterrorism preparedness and in a number of other areas," said Joy Howell, spokeswoman for the newly formed Scientists and Engineers for Change. The group, which includes 10 Nobel winners and two former presidential advisers, accuses Bush of spending...