Paul Ryan and the Race to the White House

In less than a week since Mitt Romney's choice of Paul Ryan, it's been called a triumph of Reaganesque proportions -- and a political disaster. In fact, few potential voters know much about the 42-year-old from Wisconsin, a staff member on Capitol Hill until his election to Congress in 1999. But it's already clear that the focus of the presidential campaign has shifted from jobs and the economy to the size and power of the federal government. How radical are Ryan's budget proposals?  How much does he want to change Medicare? Will his presence on the Republican ticket clarify the differences between the parties or produce more confusion than ever?