Watch Willie Nelson Sing New Song 'Vote 'Em Out' at Texas Rally

During a rally for Texas Senate candidate Beto O'Rourke, Willie Nelson sang a new song to encourage voters to use their voice on Election Day.

"Here's a new song we're gonna spring on y'all tonight," Nelson said, introducing the song. "Take it home with you, spread it around."

"Vote 'Em Out" encourages anyone discouraged with the state of the government to vote their conscious.

"If you don't like who's in there vote 'em out, that's what Election Day is all about," Nelson sings. "And the biggest gun we got is called the ballot box. If you don't like who's in there vote 'em out."

Nearly 60,000 attended the free concert at Auditorium Shores in Austin, Texas. The event marked the first time Nelson has played a free public concert for a political candidate.

Read More: Lukas Nelson Thoughtfully Defends Willie Nelson's Support of Beto O'Rourke

Nelson has drawn criticism from some fans for his support of Beto O'Rourke, though the country legend has never been shy about speaking his mind.

During a recent appearance on The Late Show with Stephen Colbert, the talk show host asked Nelson if he was bothered by people boycotting his music in response to his support of O'Rourke, Nelson responded "No not really. It's their prerogative. I might not like their music either, you know, so I don't hold any grudges against people."

The country singer also noted that this wasn't the first time he's backed a political candidate. In the past, Nelson has thrown his support behind Ross Perot and Dennis Kucinich.

Nelson recently recorded with rock legend Van Morrison in Pittsburgh while the two were on the Outlaw Music Fest Tour together.

The country icon released his sixty-eighth studio album, My Way, an album of Frank Sinatra covers, on Sept. 14.

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Watch Willie Nelson Sing New Song 'Vote 'Em Out' at Texas Rally