Gangel, whose many political interviews during her 30-year run at NBC included six U.S. presidents, will be a special correspondent for the cable news channel.
The hiring reunites her with CNN President
"In her time there, she reported some of the best stories and delivered some of the most exclusive interviews on the program," Zucker said in a memo sent to staff Monday. "I am thrilled that she will now join us, contributing reports and interviews to all of our programs."
The Washington, D.C.-based Gangel is the wife of bestselling novelist and former TV news producer Daniel Silva.