Here are some headlines shaping today's show.
- Cops admit missing possible racial slur in Trayvon Martin phone call
- Trayvon Martin parents to attend march in New York City
- George Zimmerman not a member of recognized neighborhood watch organization
- Martin's killer was looking for trouble — and found it
- Jeb Bush endorses Romney for president
- Freedomworks accepts Mitt Romney
- Former Republican House Majority Leader: "Circular firing squad" GOP primary will drag on
- Rush Limbaugh: "Maybe the conservative alternative to Romney — is Romney"
- Top Romney adviser: Romney can reset "like etch-a-sketch"
- Santorum studies Romney positions on Etch-a-Sketch
- Gingrich carries an Etch-a-Sketch at Louisiana town hall
- Purple Strategies poll:Obama leads GOP among independents
- Nate Silver: Republican nomination becoming one-man race
- Progressives suffer defeat in key congressional primary
- "Global warming" gets a rebranding
- President Obama takes on GOP over energy policy
- Women using Facebook to solicit Rick Perry's reproductive health advice