In any election year, we’re all used to seeing mud flying.  But according to Amy Ridenour of the National Center for Public Policy Research, recent attacks on President Bush’s environmental record are grossly misleading.  Comments Ridenour: “Critics of President Bush claim the White House has weakened federal limits  on mercury emissions from power plants.  But is this charge true?  When George W. Bush took office, there were no such federal regulations reducing mercury emissions, so it would impossible for Bush to have weakened them.  In fact, he’s done the reverse, imposing the first such limits ever.  When it comes to environmental policy, our first step should be the truth.”