Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

COLUMBIA, SC - FEBRUARY 18: Republican presidential candidate Donald Trump speaks at a CNN South Carolina Republican Presidential Town Hall with host Anderson Cooper on February 18, 2016 in Columbia, South Carolina. The primary vote in South Carolina is February 20.  (Photo by Spencer Platt/Getty Images)
COLUMBIA, SC - FEBRUARY 18: Republican presidential candidate Donald Trump speaks at a CNN South Carolina Republican Presidential Town Hall with host Anderson Cooper on February 18, 2016 in Columbia, South Carolina. The primary vote in South Carolina is February 20.  (Photo by Spencer Platt/Getty Images)

    JUST WATCHED

    GOP strategist: Lots of Trump opposition research

MUST WATCH

GOP strategist: Lots of Trump opposition research

CNN political commentator S.E. Cupp and Republican strategist Phil Musser agree Donald Trump's rivals have let him skate by in the primary contest.

GOP strategist: Lots of Trump opposition research

CNN political commentator S.E. Cupp and Republican strategist Phil Musser agree Donald Trump's rivals have let him skate by in the primary contest.