Mary Catherine is CNBC's Washington deputy bureau chief. Prior to joining the Washington bureau, she was the San Francisco bureau chief, helping launch the operation in 2015 and build CNBC's tech coverage in the Bay Area. She also spent two years in the Los Angeles bureau as a field producer covering media and technology. In addition to her broadcast experience, Mary Catherine launched and created the business network's first-ever social media team. She began her media career as an NBC page.
The inquiry by the EPA's Office of Inspector General will be the fifth probe by that office into Pruitt's tenure.
Bewkes is the highest profile executive to testify so far. AT&T CEO Randall Stephenson is expected to take the stand later this week.
Treasury Secretary Steven Mnuchin says the White House is closely following the turmoil in financial markets, but it's not that concerned.
The CEO of a food start-up defended the company from accusations that it was buying inventory of its vegan mayonnaise in order to inflate sales.
Vegan food start-up Hampton Creek undertook a large-scale operation to buy back its own mayo, making the product appear more popular, Bloomberg reported Thursday.