Candidates in Thursday's GOP debate laid heavy punches on Donald Trump as the race heads into the crucial mid-March point.
- Ben Carson says he's leaving the campaign trail
- Donald Trump is sitting out an appearance before influential conservatives
- Here's why Florida matters so much to the GOP strategy to deny Trump an outright nomination
- Last night's debate drew a huge audience for Fox News
- Mary McNamara: The debate was more like "Real Housewives"