Chao is married to Senate Majority Leader Mitch McConnell.
The House Oversight and Reform Committee on Monday launched an investigation into Transportation Secretary Elaine Chao over whether she is using her office to benefit herself and her family.
The investigation follows a series of reports alleging that Chao used her role in the Trump administration to boost Foremost Group, a shipping company founded by her father.
“The Committee is examining your misstatements of fact, your actions that may have benefitted the company in which you continued to hold shares, and your compliance with ethics and financial disclosure requirements,” Oversight and Reform Committee Chairman Elijah Cummings (D-Md.) and Rep. Raja Krishnamoorthi (D-Ill.), chairman of the Oversight and Reform Subcommittee on Economic and Consumer Policy, wrote in a letter to Chao requesting documents.
Foremost has received hundreds of millions of dollars in loan commitments from a bank run by the Chinese government. Reports of Chao making joint public appearances and planning to travel to China to meet with government officials with her father since becoming Transportation secretary led lawmakers to investigate whether she has been using her position to further her family's business.