At least 13 percent of American Jewish voters remain undecided in the presidential race, according to a national poll carried out for the American Jewish Congress. Democratic presidential candidate Senator Barack Obama is leading Republican nominee Sen. John McCain by a 57-30 margin.

Previous polls indicated that up to two-thirds of Jews support Sen. Obama. An overwhelming number of Jews back his picking Sen. Joe Biden as his running mate, while most Jews said they are against Sen. McCain's choice of Gov. Sarah Palin.