Ta Si News Today

>> just a reminder. you can watch all the action here at the reagan presidential library tomorrow night. the main event begins at 6:00. then the big 11-person debate at 8:00 eastern. again, the first round, you have pennsylvania ta si, santorum. all happening live here on cnn. do not miss a beat. coming up next here, vying for that nomination, we will talk live to ben carsons campaign about whether this rising candidate is preparing differently this go around than the last debate. plus the w...