IS Sen. John McCain going to quit the Republican Party and become the running mate of Sen. John Kerry in the 2004 presidential race? McCain's chief political adviser, John Weaver, has become a Democrat and is now working for Dick Gephardt. McCain's new legislative director, Christine Dodd, last worked for a liberal congressman - a Democrat. Now Kerry of Massachusetts, who has made clear his plans to run in 2004, is making overtures towards McCain. A rumored head-to-head between Kerry and McCain is said to be scheduled at McCain's cabin in Sedona, Ariz., next month. And for "Man of the...