Before Taylor Swift's endorsement, a Tennessee poll measured her influence

Since Taylor Swift endorsed Kamala Harris for president Tuesday night, federal officials said more than 337,000 people have visited Vote.gov using the voter registration link Swift shared with her post.

Why it matters: Recent polling in Tennessee suggests Swift's opinion could have a small but significant impact on how some of her fans vote.

Flashback: An April poll from the Beacon Center, a libertarian political think tank, found 37% of registered Tennessee voters considered themselves Taylor Swift fans.

• Within that group of Swifties, 12% said that if Taylor Swift endorsed a candidate for president or U.S. Senate, it would make them more likely to vote for that candidate.

Reality check: That is a small sliver of the electorate, and it isn't expected to sway the results in Tennessee, where polls show former President Trump in a commanding lead.

Yes, but: The Beacon Center poll could be more impactful in close swing states where results often come down to the wire.

What they're saying: "While Taylor Swift's endorsement likely wouldn't impact the outcome of the presidential or Senate race in Tennessee, it could make a huge difference in swing states if the numbers are similar in other parts of the country," Beacon Center spokesperson Mark Cunningham told us in April.

What we're watching: Swift endorsed Tennessee Democrats for Senate, House and governor in 2018 . She was particularly critical of Republican Sen. Marsha Blackburn , who went on to win the race.

• Blackburn is running for re-election this year against Democratic challenger Gloria Johnson .
• Swift has yet to weigh in on down-ballot races in this cycle.

Editor's note: This story was updated new data on Vote.org visits.

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