TN-Sen: Taylor Swift endorsed Dem Phil Bredesen over GOP's Marsha Blackburn. It backfired big time.

Pop star Taylor Swift made headlines this week when she announced her surprise endorsement of former Tennessee Gov. Phil Bredesen (D) in the race for Tennessee's U.S. Senate seat. In doing so, Swift denounced Republican Rep. Marsha Blackburn, who is challenging Bredesen for the seat.

"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," Swift wrote to her 112 million Instagram fans. "I will be voting for Phil Bredesen."

But it appears Swift's endorsement did not boost Bredesen.

What are the details?

A new survey from the New York Times, which was conducted between Oct. 8 through Oct. 11 — the immediate days after Swift's endorsement sent shockwaves through the crucial Senate race — found that Blackburn has a double-digit lead over Bredesen.

Her lead, the poll found, is 14 points: 54 percent to Bredesen's 40 percent. Blackburn also topped her opponent in overall favorability, 51 percent to 44 percent.

Bredesen, a moderate Democrat who voiced support for Brett Kavanaugh, had been building momentum over the summer. But that forward push has fallen flat in recent weeks, and it doesn't appear it will improve any time soon.

In addition to the New York Times poll, two other recent major polls found that he trails Blackburn by more than five points. According to RealClearPolitics, Blackburn now leads Bredesen by an average of 5.5 points.

Indeed, with just weeks before Election Day, most experts believe Blackburn will defeat Bredesen, helping Republicans retain their majority in the Senate. And it's no surprise either. Tennessee is a deeply red state that overwhelmingly backed President Donald Trump in the 2016 election. And fortunately for Blackburn, she has the president in her corner.