During Tuesday's Republican presidential debate in Las Vegas, all eyes were on frontrunners Donald Trump and Sen. Ted Cruz (R-Texas).
With the Iowa caucuses just seven weeks away, the top-tier candidates battled it out over national security and immigration. Dr. Ben Carson had a few awkward moments, while former Florida Gov. Jeb Bush and Sen. Rand Paul (R-Ky.) had strong performances.
Sen. Lindsey Graham (R-S.C.), former Sen. Rick Santorum (R-Pa.), former Arkansas Gov. Mike Huckabee (R) and former New York Gov. George Pataki participated in the earlier undercard debate.
Watch the highlights above.
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