WASHINGTON (Reuters) - Outspoken U.S. conservative columnist Ann Coulter is drawing fire from Republicans and Democrats alike after publicly using a derogatory gay slur in reference to Democratic presidential hopeful John Edwards. "Ann Coulter not only once again went out of her way to use a nasty epithet, she pushed her offensiveness up a notch," Amy Ridenour, president of the National Center for Public Policy Research, said on Sunday. Coulter made the comments on Friday during a speech at the influential American Conservative Union's Political Action Conference, calling Edwards a "faggot." "We conservatives have enough trouble overcoming the false things...