Elon Musk's rapid takeover of two U.S. government agencies has enabled the South African-born billionaire to exert unprecedented control over America's 2.2-million-member federal workforce and begin a dramatic reshaping of government.

The president said Musk won’t have the unfettered ability to dismantle the government, but for now their relationship is holding firm.

Elon Musk worked at breakneck speed over the weekend to wipe out the U.S. Agency for International Development. His allies got access to the Treasury’s payments system. His aides reportedly locked out government employees from their computer systems that hold sensitive data.