Washington (CNN) Taylor Swift slammed Republican Sen. Marsha Blackburn of Tennessee for her conservative stances and likened her to "Trump in a wig" in her new Netflix documentary "Miss Americana."

In the documentary out Friday, Swift goes after Blackburn's record as she gets emotional discussing with her parents and team about wanting to voice her opinion in the 2018 midterm elections, adding that she regrets not speaking out against Donald Trump during the 2016 election.

Swift, who had been reluctant to voice her political opinions in the past, broke her silence on politics during the 2018 midterms and endorsed Blackburn's rival for Senate, Democrat Phil Bredesen, and another Democrat running in Tennessee in an Instagram post. In the post's caption, Swift had said Blackburn's voting record "appalls and terrifies me."

Blackburn, a conservative lawmaker closely tied to the President, ended up winning her 2018 race by about 11 points, becoming the first female senator to represent her state.

Later in the documentary, Swift is shown reacting to Blackburn's election victory, saying she "can't believe it."

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