US Jews continue to back President Barack Obama over presumptive Republican nominee Mitt Romney, but support for the incumbent remains well below 2008 levels, according to a Gallup poll published Friday.Tracking from June 1 - June 26 found that Jewish registered voters favored Obama over his Republican challenger by 68 percent to 25%. This represents similar support levels as the last Gallup poll, taken in April-June 2012, which found that 64% of Jews supported Obama while 29% supported Romney.