Billionaire industrialist Charles Koch is jokingly donning a Darth Vader suit for work after an NPR interviewer described him as “pretty much Darth Vader” to his political opponents.

His company, Koch Industries, tweeted a photo of Charles Koch at his desk dressed as the "Star Wars" villain.

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Koch and his brother, David, have used their considerable wealth to back numerous conservative causes and candidates, much to the displeasure of their political opponents. 

The libertarian philanthropist has so far abstained from donating directly to candidates in the Republican presidential primary. But several candidates in 2016 have received donations from the extensive Koch donor network that helped grow the conservative Tea Party movement.

The Koch network plans to spend at least $300 million in the 2016 election cycle.