Editor's note: William J. Bennett, a CNN contributor, is the author of  "The Book of Man: Readings on the Path to Manhood." He was U.S. secretary of education from 1985 to 1988 and director of the Office of National Drug Control Policy under President George H.W. Bush.

By William Bennett, CNN Contributor

(CNN) - When the Republican National Convention kicks off this week in Tampa, Florida, the nation will notice one thing before anything else: This is not your father's or grandfather's Republican Party. Rather, it's a party with leaders as diverse as the country it intends to represent.

With the nation's changing demographics, Republicans can no longer rely on the South and Midwest to carry them to victory in 2012. Instead, they must broaden their base into traditionally purple and blue states. It's an uphill battle: President Obama leads by a sizeable margin with women and by wide margins with Latino and black voters. But it's not insurmountable. Romney already leads with men by roughly the same number President Obama leads with women. Nor is it unprecedented. Republicans won a landslide victory in the 2010 fall midterm elections. Now they must devise a strategy to repeat that.

Republicans, in short, must repeat what they did in their landslide victory in the 2010 fall midterm elections.

Read William Bennett's full column