Al Drago/Pool via AP
- Republican Senator Markwayne Mullin had a heated argument with the head of a union on Wednesday.
- Mullin claimed he only paid himself a $50,000 salary and "invested every penny" into his business.
- But he'd reported his private-sector salary at $92,000, with another $200,000 in income.
A Republican senator drastically understated how much money he made in the private sector as he argued with the head of the Teamsters union at a hearing in Washington on Wednesday.