The feud between Elon Musk and President Donald Trump heated up again Tuesday after the billionaire slammed Republicans over the president's spending bill.

The war of words between billionaire Elon Musk and President Donald Trump over the big bill of tax breaks and spending cuts is heating up again, with Musk claiming he may form a new political party and Trump blasting the Tesla CEO over electric vehicle subsidies.

That doesn’t guarantee he’ll succeed: Musk spent considerable time and resources in a losing effort to elect a Republican to Wisconsin’s supreme court earlier this year. His popularity remains low, and, ultimately, Donald Trump is president, and Musk is not.