Barack Obama's oratory skills may have helped him win the White House in 2008, but his speaking prowess could be a liability in this year's presidential election, says Sam Leith, author of Words Like Loaded Pistols: Rhetoric From Aristotle to Obama. Rhetoric is central to democracy, says Leith. "You win elections by talking to people, by trying to persuade them, not only on what you're going to do, but that you're trustworthy." And, he says, Obama talked his way into the Oval Office with "amazing speeches" that invoked Abraham Lincoln and Martin Luther King Jr., and he even beat out...