Elon Musk launched a scathing attack on Trump’s flagship tax-and-spending bill Monday, according to CNBC. The billionaire called it a “DEBT SLAVERY bill” and vowed to fund primary challengers against Republican lawmakers who support it. Musk’s criticism came as the Senate debated amendments to the bill under reconciliation before it returns to the House and Trump. Musk intensified his criticism by denouncing the bill’s $5 trillion debt ceiling increase and calling the U.S. a “one-party country,” urging the creation of a new political party.