Musk and Warren trade barbs over taxes

• "You remind me of when I was a kid and my friend’s angry mom would just randomly yell at everyone for no reason," Musk continued.
• "Please don't call the manager on me, Senator Karen," Musk added in another Twitter jibe, using the slang term for a white woman perceived as entitled.
• "And if you opened your eyes for 2 seconds, you would realize I will pay more taxes than any American in history this year," Musk added in another tweet.

Between the lines: It's unclear how much tax Musk has paid since such matters are generally private, but he's offloaded billions of dollars of his Tesla stock in recent weeks.

• The sales are part of a plan to exercise some of his vested stock options that will expire next year, and to sell some holdings to cover tax obligations, Axios' Kia Kokalitcheva notes.

The big picture: Musk surpassed Amazon chief Jeff Bezos as the world's richest man earlier this year.

• Warren has been pushing in Congress for new taxes on the assets of America's wealthiest individuals.

Go deeper: Why it's so hard to tax wealth

Editor's note: This article has been updated with more comment from Musk and further context.