television, radio, the internet, all the way up to tampa. and the question will be asked is who can best beat barack obama? and at that point, i think most republicans agree that i would probably do a better job debating obama than any other candida candidate, and i think it becomes a very viable, very lively campaign. >> he says he'll march on. in less than a week, voters head to the polls in maryland and washington, d.c., and also wisconsin, which is the state people are really going to be looking at. mitt romney holds now a pretty big lead there, according to a marquette law school poll. romney has 39% support in wisconsin, up 21 points from last month. rick santorum follows eight points behind romney. that's a three-point drop for santorum since february. we're getting some new detail about the night 17-year-old trayvon martin was killed in florida. several reports indicate the lead investigator in the case recommended the gunman, george zimmerman, be charged with manslaughter. the investigator says he was instructed not to press charges because the state's attorneys