Elon Musk has pushed back against those questioning whether he is truly American in a recent social media post. Musk's citizenship status has become a point of political debate in recent weeks, with the billionaire's opponents using his South African and Canadian citizenship to question his loyalty to the U.

Elon Musk's speculation about dead or fictitious employees comes after numerous federal workers were told to ignore an email asking them to justify their jobs. Previous government reviews found no evidence of widespread payroll fraud.