WASHINGTON — The breakup between the president of the United States and the world's richest man is unfurling much like their relationship started — rapidly, intensely and very publicly.

What You Need To Know • President Donald Trump says he's "disappointed" with Elon Musk after his former backer and adviser lambasted his signature tax cuts and spending bill • Trump on Thursday suggested the world's richest man misses being in the White House and has "Trump derangement syndrome" • The Republican president reflected on his breakup with Musk in front of reporters in the Oval Office as Musk continued a storm of social media posts attacking Trump's "Big Beautiful Bill" and warning it will increase the federal deficit • Musk has called Trump's big tax break bill a "disgusting abominatio

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