John F. Kennedy
Can Bobby Shriver reboot his campaign?
Can Bobby Shriver reboot his campaign?

In politics, there are few positions that are simultaneously more desirable and more vulnerable than that of the “inevitable” candidate.Candidates seen as near-certain winners have an easier time raising money, because donors want to secure favor with a winner. The money then feeds an upward spiral of momentum: buying advertising, which broadens support, which in turn brings in more money and support. But it all depends on a candidate appearing invulnerable. If a “sure winner” begins to show signs of weakness, donors get spooked, jitters set in, supporters drift away, and the spiral can quickly become a downward one. Case in point: Hillary Rodham Clinton in 2008.That's where Bobby...