The pair has spent much of the week taking increasingly aggressive pot shots at each other in social media posts and press appearances. Musk on Wednesday posted that Senate Republicans should vote to “KILL the BILL,” which would add trillions to the deficit while cutting Medicaid and other programs benefitting the poor.

Sen. Ron Johnson is breaking with President Donald Trump over a major spending bill, citing concerns about national debt and proposing alternative solutions.

President Trump responded to Elon Musk’s criticism of his tax-and-spending bill, saying cutting the EV mandate in the legislation “disturbed” Musk.