Musician Willie Nelson said Tuesday that he's not bothered by the fact that many of his fans are boycotting him because he's headlining a rally for Rep. Beto O'RourkeBeto O'RourkeMexico emerging as foreign policy challenge for Biden Beyoncé sports pro-Biden mask on Instagram Harris to travel to Texas Friday after polls show tie between Trump, Biden MORE (D-Texas) later this month. 

"I don’t care," Nelson said on ABC's "The View. "You know, they’re entitled to their opinions and I’m entitled to mine." 

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Nelson added the he's been supporting Democratic lawmakers his entire life and that he didn't know why this latest event sparked outrage from a contingent of his fans. 

"Everybody has an opinion," he said. "Everybody has a right to an opinion." 

O'Rourke, who is running to unseat Sen. Ted CruzRafael (Ted) Edward CruzOcasio-Cortez, Cruz trade jabs over COVID-19 relief: People 'going hungry as you tweet from' vacation McSally, staff asked to break up maskless photo op inside Capitol Capitol's COVID-19 spike could be bad Thanksgiving preview MORE (R-Texas) this November, announced last week that Nelson would headline a rally in Austin, Texas on Sept. 29. 

Rolling Stone reported that the appearance from Nelson would mark his first-ever public performance on behalf of a political candidate. 

Fans quickly took issue with the announcement, with many posting angry comments on the singer's Facebook page, where he had shared a post on his plans to headline an event for the Democratic Senate candidate. 

“Open your eyes Willie!” one user said on his Facebook. “Beto is a Socialist who probably has lied to you. This is a real shame you support him.”

“I am no longer willing to watch that hippie guitarist who supports that … socialist running for Senate,” another user said on Twitter.

Nelson in a statement said he and his wife "share [O'Rourke's] concern for the direction things are headed" in the U.S. 

While Texas has not elected a Democrat to the Senate in three decades, polls have continued to show that Cruz and O'Rourke are in a tight race. 

An average of polling produced by RealClearPolitics shows Cruz up by 4 points. The Cook Political Report rates the race as “Lean Republican.”