MARIETTA, Ga. (AP) — Under the fluorescent lights of an American Legion hall near Atlanta, in front of more than a dozen Democratic activists, Geoff Duncan apologized for all the things that he did as a Republican. He regrets opposing gun control. He’s sorry for fighting the expansion of Georgia’s Medicaid program. And he’s most remorseful about supporting some of the strictest abortion rules in the country. “Unlike most folks in politics, I’m willing to say I’m sorry for that,” Duncan said. He’