MACOMB, Mich. Macomb twins Samantha and Madison Sacra are both graduating from Eisenhower High School as valedictorians and AP Scholars. The pair say a little sibling rivalry has helped them both get to the top of the class. Its always been kind of competitive," Samantha Sacra said. At the end of the summer, Madison and Samantha will take their sibling rivalry in different directions. The twins say they will keep working hard in school, especially with a little sister coming up right behind them to keep them motivated.