Elon Musk is testing the limits of legal and ethical restrictions on the role of special advisers in U.S. presidential administrations, according to some legal experts and lawmakers who oppose the billionaire's mission against what he deems wasteful government spending.

Elon Musk is officially serving under President Donald Trump as a special government employee, according to a White House official.

Musk’s increased involvement with federal agencies has lowered morale and created a workplace energy of “fear” and “madness.”