Jeb Bush (left), Marco Rubio (top) and Rand Paul is pictured. | Getty
Bush’s move and the clash over Cuba accelerates the run-up to 2016.
By Katie Glueck
| 12/19/14 6:07 PM EST
| Updated 12/20/14 11:37 AM EST
Jeb Bush got serious, Marco Rubio railed on a topic close to home and Rand Paul took yet another contrarian view.