Kingston served as Vice Chair of the House Republican Conference from 2003 to 2007. He also ran for the U.S. Senate in 2014 but was not elected. In 2015 Kingston became the chairman of the Georgia Republican Party Foundation and he also works as a public policy principal for Squire Patton Boggs. Jack Kingston endorsed Ted Cruz for president in 2016 but was later a senior advisor and spokesperson for Donald Trump. He became a political commentator for CNN in 2017.