Shares of Tesla entered Monday down more than 34% year to date, and the stock has been cut nearly in half from its peak in December.

Elon Musk acknowledged that his job as head of President Donald Trump’s effort to cut the size of government is “costing me a lot” when it comes to his other big job, as CEO of Tesla Inc.

The plan for a day of mass demonstrations follows a series of violent incidents. Anti-Musk activists have been accused of throwing Molotov cocktails at Tesla facilities in Colorado, Nevada and Oregon and defacing Tesla vehicles there, and on Monday, authorities said they found multiple “ incendiary devices ” at a Tesla location in Texas.