Poll: Obama tops list ranking best president in Americans' lifetime

More than 40 percent of Americans say that Barack ObamaBarack Hussein ObamaNew year brings more liberated Joe Biden  After the loss of three giants of conservation, Biden must pick up the mantle Kyrsten Sinema's courage, Washington hypocrisy and the politics of rage MORE was the best or second-best president in their lifetime, according to a new poll from the Pew Research Center.

The poll asked people in an open-ended format which president has done the best job in their lifetimes, using respondents' first and second choices for the survey's findings. 

Forty-four percent of Americans said Obama was either the best or the second-best president in their lifetime, with 33 percent saying the same for Bill ClintonWilliam (Bill) Jefferson ClintonA year into his presidency, Biden is polling at an all-time low Second gentleman Emhoff acts as public link to White House To progressive Democrats: Follow the lesson of Maine state Sen. Chloe Maxmin MORE. Thirty-two percent said Ronald Regan was the best or second-best president in their lifetime. 

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Meanwhile, 19 percent said the same for President TrumpDonald TrumpWendy Sherman takes leading role as Biden's 'hard-nosed' Russia negotiator Senate needs to confirm Deborah Lipstadt as antisemitism envoy — Now Former acting Defense secretary under Trump met with Jan. 6 committee: report MORE, who has been in office since 2017.

The survey notes that Americans' views on the best president is largely tied to their age. Millennials were more likely than older generations to list Obama as the best president in their lifetime, while older Americans are much more likely to name Reagan as the best president. 

Sixty-two percent of millennials believe Obama is either the best or second-best president in their lifetime. On the other hand, about 4 in 10 of the two older generations (baby boomers and the the silent generation) named Reagan the best president. 

Pew notes that most millenials were born after Reagan presided as president. 

The survey shows that a divide along party lines exists. Seventy-one percent of Democrats and Democratic-leaning independents say Obama is the best or second-best president in their lifetime. Meanwhile, 57 percent of Republicans and Republican-leaning independents say Reagan was the best in their lifetime. 

The Pew survey was conducted from June 5 to 12 among a population of 2,002 adults. The survey has a margin of error of 2.6 percentage points.