Jeb Bush fires back at Trump: My brother kept us safe

Former President George W. Bush hit the campaign trail in South Carolina, stumping for his brother Jeb Bush and encouraging Americans to ignore “the empty rhetoric.”

00:53 - Source: CNN
Jeb Bush
Former US President George W. Bush (R) waves with his wife Laura (L) as he stands with his brother and Republican presidential candidate Jeb Bush during a campaign rally in Charleston, South Carolina, February 15, 2016.
Now playing
Jeb Bush fires back at Trump: My brother kept us safe
Jeb Bush Jamie Gangel interview
Now playing
Jeb Bush to Trump: Stop making false statements
how jeb bush describes himself origwx bw_00000112.jpg
Now playing
Jeb Bush has a way with words
bush suspends
Now playing
Jeb Bush suspends campaign: What went wrong?
COLUMBIA, SC - FEBRUARY 20:  Jeb Bush reacts as he announces the suspension of his presidential campaign at an election night party at the Hilton Columbia Center in Columbia, SC on February 20, 2016.  Donald Trump won decisively in the South Carolina Republican Presidential Primary, the "first in the south."  (Photo by Mark Makela/Getty Images)
Now playing
Jeb Bush's emotional South Carolina speech
WASHINGTON, DC - DECEMBER 03:  Republican presidential candidate and former Florida Gov. Jeb Bush addresses the Republican Jewish Coalition at Ronald Reagan Building and International Trade Center December 3, 2015 in Washington, DC.  (Photo by Alex Wong/Getty Images)
Now playing
Report pokes holes in Jeb Bush's NRA award story
NORTH LAS VEGAS, NV - OCTOBER 21:  Republican presidential candidate Jeb Bush speaks during the LIBRE Initiative Fourm at the College of Southern Nevada on October 21, 2015 in North Las Vegas, Nevada. Bush said earlier in the day if elected president, he'd try to move the Interior Department's headquarters to the West, closer to the needs of the community.  (Photo by David Becker/Getty Images)
Now playing
Jeb Bush: Mr. Nice Guy?
jeb bush rubio sot gengel lead_00002516.jpg
Now playing
The Bush family and Iraq
Republican presidential candidate and former Florida Gov. Jeb Bush speaks at a town hall meeting at the Valley View Recreation Center on June 27, 2015 in Henderson, Nevada.
Now playing
Jeb Bush's unpolished moments
jeb bush impersonates donald trump sot_00000709.jpg
Now playing
Jeb Bush impersonates Donald Trump
bush family
Now playing
28 years of Bushes announcing presidential campaigns