Even Donald Trump doubted Elon Musk’s ability to cut $1 trillion in federal spending.

“Was it all bulls–t?” Trump asked advisers of Musk’s cost-cutting under the Department of Government Efficiency (DOGE), the Wall Street Journal reported in a behind-the-scenes look at the pair’s working relationship.

Musk pledged to cut $1 trillion from the federal budget but ultimately managed to cut only $170 billion, according to DOGE’s own calculations, which have themselves been called into question.