see more

An Instagram wall in the social media room is already being populated for the Republican presidential debate, hosted by CNN, at The Venetian hotel in Las Vegas, Nevada, December 15, 2015. On the main stage at the GOP debate later today will be businessman Donald Trump, Texas Sen. Ted Cruz, retired neurosurgeon Ben Carson, Florida Sen. Marco Rubio, former Florida Gov. Jeb Bush, businesswoman Carly Fiorina, Ohio Gov. John Kasich, New Jersey Gov. Chris Christie, and Kentucky Sen. Rand Paul. AFP PHOTO / L.E .BASKOW / AFP / L.E. BASKOW (Photo credit should read L.E. BASKOW/AFP via Getty Images)

An Instagram wall in the social media room is already being populated for the Republican presidential debate, hosted by CNN, at The Venetian hotel in Las Vegas, Nevada, December 15, 2015.  On the main stage at the GOP debate later today will be businessman Donald Trump, Texas Sen. Ted Cruz, retired neurosurgeon Ben Carson, Florida Sen. Marco Rubio, former Florida Gov. Jeb Bush, businesswoman Carly Fiorina, Ohio Gov. John Kasich, New Jersey Gov. Chris Christie, and Kentucky Sen. Rand Paul.  AFP PHOTO / L.E .BASKOW / AFP / L.E. BASKOW        (Photo credit should read L.E. BASKOW/AFP via Getty Images)