The billionaire and former Trump adviser suggested that if the domestic policy bill passed, he would swiftly form a new “America Party” and back primary challenges to Republicans.

Elon Musk on Monday took to his social media platform to castigate Republicans who campaigned on reining in spending but voted in favor of the “One Big Beautiful Bill,” threatening to start a new political party over the disagreement.

(Reuters) -Billionaire Elon Musk reiterated his criticism of U.S. President Donald Trump's spending legislation on Monday, arguing that it underscores the need for a new political party. The Tesla chief slammed the "insane spending" of the bill,