Surging gas prices are inflaming a longstanding economic divide in America, as households with lower incomes struggle to pay more at the pump at a moment when prices are already elevated. After more than two months of war in the Middle East, the national average gas price has surpassed $4.50 a gallon. And according to an analysis released by the Federal Reserve Bank of New York on Wednesday, the burden of the surge is falling hardest on those with the least room to absorb it. Economists at the