SPRINGFIELD, Mo. (AP) — Republican presidential contender Rudy Giuliani called for a national campaign to achieve energy independence during a Missouri campaign stop Saturday. The former New York mayor said a national program to tap new energy sources, akin to the 1960s technological race to beat the Soviets to the moon, would give Republicans a positive issue to stand for in the 2008 White House race. "Too much of our party is defined by what we're against. Too little is defined by what we're for. When you start being for something, millions and millions of people start to follow you,"...