A new Gallup poll finds that President Barack Obama´s approval rating with working-class white Americans has fallen to just 27 percent, a record-low for his presidency. Among whites who´ve graduated college, Obama´s approval stands at 41%, also a new low in the Gallup poll. (Graph) Perhaps most troubling of all for Obama: Gallup´s data only extended to the end of October, well before the recent racially-charged riots broke out in Ferguson, Missouri, and protests across the country.