Boxer's Opponents Capitalize On 'Ma'm' Exchange By KEVIN FREKING WASHINGTON – The widely played video clip of U.S. Sen. Barbara Boxer reprimanding a general for calling her "ma'am" is the gift that keeps on giving for the two Republicans hoping to challenge her next year. Republicans Carly Fiorina and Chuck DeVore are trying to capitalize on the exchange by making it a key ingredient of their fundraising efforts and attempts to recruit grassroots support. Both campaigns say the video revs up a GOP base that already has long-standing animosity toward Boxer, among the most liberal members of the Senate. Whether...