The former governor of Virginia says Americans choose his party's confident and optimistic approach to governing.
The one-time geologist and entrepreneur says skeptics should embrace efforts to mitigate global warming as an economic benefit.
Rivlin says the governement needs to cut spending and increase taxes to curb the nation's debt.
The global non-profit she leads provides funding for "social entrepreneurs" working on complex societal problems like the rebuilding in Haiti.
The professor, best-selling author, and advisor to four presidents says collaboration and democracy are key to leadership in a post 9/11 world.
As head of the National Institutes of Health, Collins is leading the charge to find genes that cause cancer and heart disease.
As chairman of the Senate Foreign Relations Committee, Kerry is leading high-stakes negotiations on Climate Change.
Cosgrove says failure is an important lesson in leadership and it's only bad if you don't recover from it.