Georgia's Geoff Duncan was once a conservative Republican. After recoiling from Donald Trump, he became a Democrat. Duncan is now one of seven members of his new party running for governor. Duncan says he can build a coalition that includes Democrats, independents and Republicans, making him the most electable. Georgia Democrats have lost six straight elections for governor. But other Democrats say they have doubts about the recent convert as their standard-bearer. Duncan might be able to lure crossover voters into Georgia's open primary. But he may have trouble winning Black voters with other strong Black candidates in the field. Duncan is one of several notable never-Trump Republicans running as Democrats this year.