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Republican presidential candidate Donald Trump addresses the media following victory in the Florida state primary on March 15, 2016 in West Palm Beach, Florida. 
The win in Florida for Trump sent rival Marco Rubio, the US senator from the Sunshine State, crashing out of the campaign. The 69-year-old billionaire also won in Illinois and North Carolina. / AFP / RHONA WISE        (Photo credit should read RHONA WISE/AFP/Getty Images)
Republican presidential candidate Donald Trump addresses the media following victory in the Florida state primary on March 15, 2016 in West Palm Beach, Florida. 
The win in Florida for Trump sent rival Marco Rubio, the US senator from the Sunshine State, crashing out of the campaign. The 69-year-old billionaire also won in Illinois and North Carolina. / AFP / RHONA WISE        (Photo credit should read RHONA WISE/AFP/Getty Images)

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    How close is Trump to securing the GOP nomination?

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How close is Trump to securing the GOP nomination?

CNN's John King looks at the current state of the GOP nomination process and examines just how close Donald Trump is to securing the Republican presidential nomination.

How close is Trump to securing the GOP nomination?

CNN's John King looks at the current state of the GOP nomination process and examines just how close Donald Trump is to securing the Republican presidential nomination.