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.

Trump said that Elon Musk developed a "problem" with his spending bill once he found out that the measure included a cut to an electric vehicle tax credit.