A new Gallup poll ranks the five living U.S. presidents by favorability, revealing who Americans view most positively—and who ranks at the bottom.

WASHINGTON — Eight years after leaving the White House, former president Barack Obama is still most favored by Americans. Last month, global analytics firm Gallup surveyed 1,001 Americans to find out which of the five remaining living presidents are best liked.

The Gallup poll — which sampled 1,001 U.S. adults between Jan. 21 and Jan. 27 — found opinions toward the men have fluctuated significantly over time.