WASHINGTON ― Elon Musk escalated his criticism of President Donald Trump's tax and budget mega-bill as the Senate took up the legislation, warning that he would boost primary challenges to defeat Republican lawmakers who vote for the legislation.

Elon Musk criticized Trump's revised spending bill, especially its impact on clean energy production, in multiple X posts over the weekend.

Elon Musk, the world's richest person, reignited his criticism Monday of the Trump-backed One Big Beautiful Bill Act.