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ORLANDO, FL - MARCH 05:  Republican presidential candidate Donald Trump speaks at the CFE Arena during a campaign stop on the campus of the University of Central Florida  on March 5, 2016 in Orlando, Florida.  Primary voters head to the polls on March 15th in Florida.  (Photo by Joe Raedle/Getty Images)
ORLANDO, FL - MARCH 05:  Republican presidential candidate Donald Trump speaks at the CFE Arena during a campaign stop on the campus of the University of Central Florida  on March 5, 2016 in Orlando, Florida.  Primary voters head to the polls on March 15th in Florida.  (Photo by Joe Raedle/Getty Images)

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    GOP Senator: Don't agree with Trump? Get out.

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GOP Senator: Don't agree with Trump? Get out.

Sen. Cotton says if you don't agree with Trump, "you have to resign." But it's not as simple as "agree" or "disagree" when the president changes his mind.

GOP Senator: Don't agree with Trump? Get out.

Sen. Cotton says if you don't agree with Trump, "you have to resign." But it's not as simple as "agree" or "disagree" when the president changes his mind.