The price of gasoline is damaging not just Americans' finances and mobility -- but the public's broader economic sentiment, and with it, Barack Obama's re-election prospects. With gas up 26 percent this year to an average $3.88 a gallon, seven in 10 Americans in this ABC News/Washington Post poll report financial hardship as a result, six in 10 say they've cut back on driving -- and, among those hardest hit, Obama's ratings are suffering.