Musk, who officially left the White House last week, appeared to be pointing to estimates from budget experts who found that the Republican tax bill could add more than $2.5 trillion to the federal deficit in the coming years.

Elon Musk left his cost-cutting role in Washington, D.C., marking the occasion with a warm Oval Office press conference last week, standing alongside President Donald Trump.Now, cracks are appearing in the relationship between the world’s richest person and the president.