WASHINGTON - US President Barack Obama's job approval rating, weighed down by soaring gas prices, has plunged below 50 per cent, giving his political opponents what appears to be an opening in the November election, a new opinion poll showed. The survey by ABC News and The Washington Post indicated that only 46 per cent of Americans now approved of the way Obama is handling his job and 50 per cent disapproved. The situation was a reversal from early February when 50 per cent approved of the president's performance and 46 per cent disapproved. According to the survey, the drop...