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Republican presidential candidates, Sen. Marco Rubio, R-Fla., left, Donald Trump, Sen. Ted Cruz, R-Texas,  and Ohio Gov. John Kasich, right,  stand together before the start of the Republican presidential debate sponsored by CNN, Salem Media Group and the Washington Times at the University of Miami,  Thursday, March 10, 2016, in Coral Gables, Fla. (AP Photo/Alan Diaz)
Republican presidential candidates, Sen. Marco Rubio, R-Fla., left, Donald Trump, Sen. Ted Cruz, R-Texas,  and Ohio Gov. John Kasich, right,  stand together before the start of the Republican presidential debate sponsored by CNN, Salem Media Group and the Washington Times at the University of Miami,  Thursday, March 10, 2016, in Coral Gables, Fla. (AP Photo/Alan Diaz)

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    Has the GOP changed its tone?

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Has the GOP changed its tone?

The most recent GOP debate saw a major shift in tone, switching from personal attacks to policy discussion. CNN's Sara Murray reports.

Has the GOP changed its tone?

The most recent GOP debate saw a major shift in tone, switching from personal attacks to policy discussion. CNN's Sara Murray reports.