A tweet by an Ohio Republican congressional candidate made parallels between President Obama, Adolf Hitler and two Communist leaders. Marisha Agana's tweet Sunday named Obama and Hitler along with Soviet leader Josef Stalin and Communist Chinese leader Mao Zedong . It followed an earlier tweet that called on readers to "beware of people who rose meteorically from nowhere like Obama." Campaign manager Larry Nichols says the Warren-area candidate believes any national leader who supports abortion rights is supporting genocide. Nichols says she regrets not fully explaining her meaning. Agana is challenging Democratic incumbent Tim Ryan.