While African Americans continue to show overwhelming support for President Obama, his approval among non-Hispanic Whites has dipped considerably since his election a year ago, according to a new Gallup poll.

At lease nine in 10 Blacks agree with the job that Obama is doing, a consistently steady number, Gallup data show, but fewer than four in 10 Whites approve of the way the way the president is handling his business. When Obama’s first full week ended in Feb. 1, 61 percent of Whites approved, compared to 39 percent this week, according to Gallup.

Obama’s support among non-Whites dropped by 7 percentage points – from 80 percent to 73 percent – over the same period, Gallup says. Overall, Obama’s approval among adults fell from 66 percent during his first week to the current 49 percent this week.