President Donald Trump fired back at pop star Taylor Swift (shown above) for her unexpected endorsement of Democratic congressional candidates in her home state of Tennessee.

When asked about Swift’s endorsements and her negative comments about GOP Tennessee Senate hopeful Rep. Marsha Blackburn, President Trump was unaware of what had been said.

When it was briefly summarized for him, though, he gave a candid response.

“I’m sure Taylor Swift has nothing or doesn’t know anything about her,” Trump said of Swift. “Let’s say that I like Taylor’s music about 25 percent less now, OK?”

In her lengthy Instagram post over the weekend, Swift bashed Blackburn, writing, “As much as I have in the past and would like to continue voting for women in office, I cannot support Marsha Blackburn. Her voting record in Congress appalls and terrifies me.”

In the post, Swift endorsed a pair of Democrats: former Tennessee Gov. Phil Bredesen to fill the Senate seat and incumbent U.S. Rep. Jim Cooper in his race in the state’s 5th Congressional District.

Related: Taylor Swift Throws Her Support Behind Democrat in Tennessee

Although Swift has been reluctant to speak about her political views in the past, there is a clear disagreement between the pop star and president.

After all, President Trump campaigned for Blackburn in Johnson City, Tennessee, last week and called her a “tremendous woman,” as multiple outlets, including Fox News, are reporting.

“Taylor has never to my knowledge come out and said anything about her being pro-Trump. But people would still rather believe that she is the one who is pushing Trump’s agenda.”

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Prior to Trump’s presidency, it appears as though he was, in fact, a fan of Swift’s. He tweeted about her twice in 2012.

In August of that year, he wrote, “@taylorswift13 Thanks for the beautiful picture — you are fantastic!”

Two months later, he also tweeted, “Glad to hear that @taylorswift13 will be co-hosting the Grammy nominations special on 12.5. Taylor is terrific!”

During the 2016 presidential election, Swift stayed quiet and did not endorse any candidate.

As a result of this, there was speculation that she was a Trump supporter; but last year, her friend Todrick Hall addressed those rumors.

“Taylor has never to my knowledge come out and said anything about her being pro-Trump,” he said.

“But people would still rather believe that she is the one who is pushing Trump’s agenda.”

Tom Joyce is a freelance writer from the South Shore of Massachusetts. He covers sports, pop culture, and politics and has contributed to The Federalist, Newsday, and other outlets.