Clinton Planning to Use Book Tour to Assist KerryBy DAVID D. KIRKPATRICK s former President Bill Clinton prepares for a barrage of publicity and a cross-country tour to promote his memoirs, his political advisers are consulting with the Democratic Party and Senator John Kerry's campaign about ways that Mr. Clinton can lend a political hand in the process.Mr. Clinton received an advance of more than $10 million to write his memoirs, "My Life," and aides to the former president say his first priority now is to sell as many books as possible. But they also say that whenever his book-selling...