(The Center Square) – Former Georgia Republican Lieutenant Governor Geoff Duncan took the stage on the third night of the Democratic National Convention and told his party to do the “right thing” and support Vice President Kamala Harris for president this November. “I am a Republican, but tonight I stand here as an American,” Duncan said to a cheering crowd in Chicago. “An American that cares more about the future of this country than the future of Donald Trump.” Duncan was not the first, nor the last, Republican to speak to the gathered Democrats over the first few days of the convention. The…