Original sentence: A recent campaign spearheaded by  Fox News' contributors Bill O'Reilly and Sean Hannity has resulted in a backlash from some Christian groups and individuals who feel the designation "holiday tree" is part of a so-called war on Christmas
Edited sentence: A recent campaign spearheaded by  Fox News' conservative contributors Bill O'Reilly and Sean Hannity has resulted in a backlash from some Christian groups and individuals who feel the designation "holiday tree" is part of a so-called war on Christmas