Republican presidential candidates (from left) Marco Rubio, Ben Carson, Donald Trump, Ted Cruz, Jeb Bush and Chris Christie were among those participating in a debate Tuesday at the Venetian Hotel & Casino in Las Vegas.
Republican presidential candidates (from left) Marco Rubio, Ben Carson, Donald Trump, Ted Cruz, Jeb Bush and Chris Christie were among those participating in a debate Tuesday at the Venetian Hotel & Casino in Las Vegas. John Locher The Associated Press
Republican presidential candidates (from left) Marco Rubio, Ben Carson, Donald Trump, Ted Cruz, Jeb Bush and Chris Christie were among those participating in a debate Tuesday at the Venetian Hotel & Casino in Las Vegas. John Locher The Associated Press

Ramesh Ponnuru and Paula Dwyer: The fear factor in the Republican debate

December 16, 2015 04:48 PM