Elon Musk said Monday he would follow through on threats to establish a third party if President Donald Trump’s “big, beautiful bill” is enacted by Congress.

Musk said on X his “America Party will be formed the next day” after its passage. He posted as the Senate moved closer to a final vote on what he called an “insane” domestic policy bill.

“Our country needs an alternative to the Democrat-Republican uniparty so that the people actually have a VOICE,” he continued.

The world’s richest man, who until recently played an active role in the Trump administration, renewed his attacks the GOP’s cornerstone legislation over the weekend. Then, on Monday, he threatened to wield his financial resources against Republicans who support it.

“Every member of Congress who campaigned on reducing government spending and then immediately voted for the biggest debt increase in history should hang their head in shame!” Musk wrote on X. “And they will lose their primary next year if it is the last thing I do on this Earth.”

Musk’s opposition to the megabill, which could cripple the renewable energy industry while adding trillions to the national debt, led to a public break with the president shortly after his time as a federal government employee came to an end in late May.

The two appeared to patch things up several days later.

But Musk is again on the offensive. He tagged two House Freedom Caucus members, Reps. Chip Roy of Texas and Andy Harris of Maryland, in another post assailing the megabill.

“How can you call yourself the Freedom Caucus if you vote for a DEBT SLAVERY bill with the biggest debt ceiling increase in history?” Musk wrote.