On his extended-cab truck's bumper is a sticker you don't often see in these parts: Republicans for Obama. But Dan Moss, who lives in Lake Worth, came to the opening celebration of Barack Obama's South Florida office here in Delray Beach on Sept. 10 and happily mingled with more than 450 other supporters. He said he felt welcomed and was hopeful Obama would be the next president of the United States.

Moss' personal...