ACAPULCO, Mexico (AP) - For generations, leftist activists have fought the Institutional Revolutionary Party in the southern state of Guerrero through the ballot box and the rifle. After skirmishes, massacres and hundreds of martyrs, they were celebrating victory Monday with dancing and the honking of horns in the state's famous resort, Acapulco. Official state election results showed former Acapulco Mayor Zeferino Torreblanca with a stunning victory, 55 to 42 percent, over the Institutional Revolutionary Party, or PRI, which has run Guerrero for 76 years. "After nearly 50 years of social struggle, we have achieved the miracle of the vote," said...