United Press International: Sens. John McCain, Hillary Clinton and Barack Obama are now arguing over how to cut record oil prices, but none of them has any credible answers. The soaring global cost of oil and record prices per gallon at the gas station for U.S. consumers is emerging as a King Kong in the 2008 presidential election campaign. Global prices are now around an extraordinary $110 a gallon. In the past week prices in some U.S. cities reached a record $4 a gallon, and the one thing as sure as death and …