Tesla CEO Elon Musk on Sunday reignited his feud with Sen Bernie Sanders, I-Vt., after Sanders shared a tweet calling for the wealthy to pay their “fair share” in taxes.

“We must demand that the extremely wealthy pay their fair share. Period,” Sanders wrote on Twitter a day before Musk’s tweet.

On Sunday morning, Musk replied to Sanders using language that seemingly was meant to disparage the 80-year-old liberal. “I keep forgetting that you’re still alive,” Musk posted.

An hour later, Musk, who has a net worth close to $300 billion, followed up with another tweet that reads: “Want me to sell more stock, Bernie? Just say the word …”

Musk sold about $5 billion in Tesla stock, according to reports on Wednesday.

Musk’s name began trending on Twitter with users slamming the SpaceX founder for mocking Sanders for making a suggestion that could help struggling Americans.

While Sanders did not mention Musk by name in his recent tweet, he did cite Musk on Wednesday when Sanders tweeted about wealth disparity, a top issue for the longtime senator.

“​​Nearly half of Americans do not earn enough to afford to rent a one bedroom apartment. Half our people continue to live paycheck to paycheck. Meanwhile, Elon Musk is some $293 BILLION richer since the start of the pandemic. That's what a rigged economy is all about,” he tweeted at the time.

Musk and Sanders previously feuded in March when Sanders told Musk to “focus on earth” rather than pouring billions into space travel. The tweet resulted in a back-and-forth exchange.

As of Sunday evening, Sanders has not publicly responded to Musk’s comment regarding taxing the wealthy.

Tesla CEO Elon Musk has sold $6.9 billion worth of shares since asking Twitter if he should sell 10 percent of his stock in the electric carmaker Tesla CEO Elon Musk has sold $6.9 billion worth of shares since asking Twitter if he should sell 10% of his stock in the electric carmaker. Photo: AFP / Frederic J. BROWN