Musk, formerly seen as one of Trump’s closest allies, ignited the feud with Trump on Tuesday by denouncing his legislation as a “disgusting abomination,” calling it a “massive, outrageous, pork-filled” bill on social media platform X. Now, Republicans are taking sides in the ongoing fight.

The relationship between Mr. Trump and tech industry power brokers was built on money and the promise of deregulation, with Mr. Musk in the middle of it all.

Elon Musk’s once-rosy relationship with President Donald Trump has turned sour in a high-profile political and financial feud that has played out publicly on social media.