As President Donald Trump and House Republicans looked to shepherd the party’s substantial government spending bill through Congress last week, Tesla CEO Elon Musk made his opposition to the legislation clear.

Elon Musk on Tuesday made his sharpest attack yet on President Donald Trump’s sweeping tax-and-spending package making its way through Congress, supporting Republican fiscal hawks who say the legislation would explode the national debt and do too little to rein in government spending.

The activists behind the Tesla Takedown campaign say they intend to expand beyond protests at the company’s showrooms.