“Note, I do not take a cash salary or bonus from anywhere,” Muskadded.

By comparison, wage earners live primarily off their paychecks, which are taxed as income.

He added that it’s “time for the Billionaires Income Tax.”

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Musk responded in a tweet on Sunday with a vulgar comment about Wyden’s profile picture.

It’s unclear when or if Musk will sell the 10% of his Tesla stock.

Shares in the electric car companyfell roughly 5% in premarket tradingon Monday.

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Musk doesn’t accept direct messages through his Twitter account.

Tesla didn’t immediately respond to a request for comment.

CNET’s Laura Hautala and Carrie Mihalcik contributed to this report.

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