The political arm of the Senate GOP on Monday slammed musical artists Ben Folds and Jason Isbell as members of the "unhinged left" ahead of a rally where they will perform in support of Tennessee Democratic Senate candidate Phil Bredesen.

The National Republican Senatorial Committee (NRSC) pointed to Folds's support of Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) in the 2016 presidential race and an anti-Trump comment by Isbell as evidence of "how far to the left Phil Bredesen is."

"Despite Bredesen’s moderate act, he continues to embrace people who have made it a habit of insulting the Tennessee voters who proudly supported President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE,” NRSC spokesman Michael McAdams said in the statement. “Today’s fundraiser is the latest example that Phil Bredesen is completely out-of-touch with a majority of Tennesseans.”

Folds and Isbell will perform at the Our Country, Our Future event on Monday night, which the Democrat's campaign has marketed as a coming-together of "Tennesseans of all political stripes who are excited about Bredesen's candidacy," according to The Tennessean

Bredesen, who is running against Rep. Marsha Blackburn Marsha BlackburnHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Key Democrat opposes GOP Section 230 subpoena for Facebook, Twitter, Google Senate panel threatens subpoena for Google, Facebook and Twitter executives MORE (R), served as the state's governor from 2003 to 2011, making him the last Democrat to win statewide office in deep-red Tennessee.

Democratic strategists have argued he could be uniquely positioned take back the seat currently held by Republican Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE, who is retiring.

Bredesen's campaign responded to the NRSC's comments noting that Folds played at the Republican National Convention and saying “the swamp” should take a closer look at Blackburn's “ties to hate groups and Russian nationals.”

“Jason Isbell is a champion for working men and women," Laura Zapata, Bredesen's communications director, said in a statement to local outlet The Tennessean. "Ben Folds is a leading advocate for arts education and he even played at the Republican National Convention. The swamp needs to spend less time worrying about these popular recording artists and more time looking into Marsha Blackburn’s ties to hate groups and Russian nationals, and her illegal coordination with dark-money groups in Washington.”