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.

EXCLUSIVE: The No. 2 House Republican is dismissing Elon Musk's attacks on President Donald Trump's "big, beautiful bill" after the tech billionaire once again jumped into the public fray over the legislation. "His criticism has been consistently off-base," House Majority Leader Steve Scalise, R-La., told Fox News Digital on Monday.