Pop star Taylor Swift on Sunday broke her career-long silence on politics to endorse former Tennessee Gov. Phil Bredesen (D) over Rep. Marsha Blackburn Marsha BlackburnTaylor Swift on National Voter Registration Day: 'We need everyone' Democrats smell blood with new DHS whistleblower complaint Hillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections MORE (R) in the state’s Senate race.

In an Instagram post, Swift wrote that Blackburn’s voting record “appalls and terrifies” her.

“As much as I have in the past and would like to continue voting for women in office, I cannot support Marsha Blackburn,” Swift wrote. “I will be voting for Phil Bredesen for Senate and Jim Cooper Jim CooperHouse Democrat to DeJoy: 'Is your backup plan to be pardoned like Roger Stone?' House Democrats call on State Department for information on Uighur prisoner Ekpar Asat Pelosi weighing bringing House back from August recess early over USPS issues: reports MORE for House of Representatives.”

The Cook Political Report rates the Bredesen-Blackburn race to replace retiring Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R) as a “toss-up.” A recent poll showed Blackburn leading Bredesen by 5 points.

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Swift also listed her stance on a number of political issues, including support for LGBTQ rights and condemning racism.

“I always have and always will cast my vote based on which candidate will protect and fight for the human rights I believe we all deserve in this country,” Swift wrote. “I believe in the fight for LGBTQ rights, and that any form of discrimination based on sexual orientation or gender is WRONG. I believe that the systemic racism we still see in this country towards people of color is terrifying, sickening and prevalent.”

“I cannot vote for someone who will not be willing to fight for dignity for ALL Americans, no matter their skin color, gender or who they love,” she added.

The singer has long stayed silent on her political views, only vaguely alluding to them on social media. Earlier this year, she expressed support for the March For Our Lives anti-gun violence movement.

In her post on Sunday, Swift also urged her fans to register to vote, telling them to “educate yourself on the candidates running in your state and vote based on who most closely represents your values.”

“So many intelligent, thoughtful, self-possessed people have turned 18 in the past two years and now have the right and privilege to make their vote count,” she added.