ATLANTA — Republican presidential candidate and former House Speaker Newt Gingrich stumped in Cobb County on Thursday, saying he can easily defeat President Barack Obama. “Beating Obama will be easy,” Gingrich said. “Obama is a disaster. He is an incompetent radical.” Fourteen years after his last speech to the Cobb Chamber of Commerce, Gingrich was back in the district where he once served. Channel 2’s Carol Sbarge went to the Cobb Energy Performing Arts Centre, where Gingrich held his breakfast speech. Gingrich criticized Republicans for not having a vision and said it’s time to control spending, reform government and balance...