Elon Musk, the world's richest person and former Trump advisor, escalated his public feud with President Donald Trump on July 1, 2025, by threatening to establish a new "America Party" the day after Congress passes Trump's controversial $4.5 trillion spending bill, marking a dramatic political break between two of the most influential figures in American politics as the Tesla and SpaceX CEO leverages his $400 billion fortune and 220 million social media followers to challenge what he calls the "Democrat-Republican uniparty."