RALEIGH NC - - One of the chief campaign bloggers for Democratic presidential candidate John Edwards quit Monday after conservative critics raised questions about her history of provocative online messages. Amanda Marcotte posted on her personal blog, Pandagon, that the criticism "was creating a situation where I felt that every time I coughed, I was risking the Edwards campaign." Marcotte said she resigned from her position Monday, and that her resignation was accepted by the campaign. Bill Donohue, president of the Catholic League for Religious and Civil Rights, demanded last week that Edwards fire Marcotte and a second blogger, Melissa...