Former Republican congresswoman Liz Cheney has attacked the world’s richest man Elon Musk and drawn attention to the fact that he has not always been a US citizen as part of a social media spat between the pair.

Tesla CEO, SpaceX founder and the richest billionaire in the world Elon Musk is now a U.S. government employee. What to know about his citizenship.

Since taking office for his second term, President Donald Trump has issued a number of orders which included establishing the Department of Government Efficiency, also known as DOGE. This program, led by Musk, has caused a stir by going through government programs to validate funding.

The SGE designation, which has come under scrutiny under Democrats as well, exempts short-term federal employees from certain disclosure rules.

Elon Musk has a White House office and growing pull across federal agencies. Now he's burrowed into the House Judiciary Committee.

Elon Musk and his allies are harnessing tech units and other agencies that handle daily federal operations to amass sweeping control of the executive branch.

Here is a look at the legal questions arising from Musk's activities as he seeks to shrink the federal bureaucracy. WHAT IS MUSK'S ROLE? The White House says Musk is a special government employee, meaning he does not get paid and is only allowed to work 130 days or fewer in a year.