Former President Barack Obama has the highest favorability of the five living U.S. presidents, according to a recent poll from Gallup. Former Presidents George W. Bush and Bill Clinton are the second and third most popular, respectively and current President Donald Trump is the fourth most popular, the poll reads.

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.

A Gallup survey of adults living in the U.S. found that former President Barack Obama is the most favorably viewed living president, while former President Joe Biden is viewed least favorably.

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.