President Obama today asked Democrats to "please go on offense" in support of the Environmental Protection Agency. The EPA is demanding that power plants cut greenhouse gas emissions by 30% below 2005 levels in the next 16 years. At a press conference this morning, EPA Administrator Gina McCarthy lauded the plan. "The bottom line is we have never -- nor will we ever -- have to choose between a healthy economy and a healthy environment. Jonathan Allen is Washington Bureau Chief for Bloomberg News.