The polls both have a margin of error of 2 points, while the Democratic and Republican subsamples each have a 4-point margin of error.

Several celebrities have already endorsed Democratic presidential candidates in this election cycle: Singer Ariana Grande said she’s backing Sen. Bernie Sanders (I-Vt.), while actors Sharon Stone and Kevin Costner endorsed former South Bend, Indiana, Mayor Pete Buttigieg and Tom Hanks and Rita Wilson gave their support to former Vice President Joe Biden.

On average, more than a third (36 percent) of Democrats said that the specific celebrity endorsements were unlikely to sway their vote one way or another. However, certain demographics were more likely to be impacted by celebrity endorsements: Among those ages 18-29, 29 percent said Grande’s endorsement of Sanders would make them more likely to vote for him, and one-third of African Americans said an endorsement of Biden from Hanks and Wilson would make them more likely to vote for Biden.

But overall, the idea of celebrity endorsements failed to move the needle for most adults. Eighty-nine percent of the public, along with 88 percent of Democrats and 91 percent of Republicans, said there was no celebrity whose endorsement would make them more likely to vote for a candidate they weren't previously planning to vote for. Nearly one-fifth of those ages 18-29 said the opposite.

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