Another equity firm, the Carlyle Group, dropped out earlier this week over similar concerns.
From 1997 through 2005, he was a partner at the Carlyle Group.
From 2001 to 2003, he was an investment banker at the Carlyle Group.
The Carlyle Group, which has a long history in the energy sector, is also considering jumping into the process, people close to that firm said.
The Carlyle Group will hold the other 60 percent.
The Carlyle Group was expected to invest for three to five years, after which a stock exchange float would take place.
He is now with the Carlyle Group, a private equity firm.
After leaving office, your father became a highly paid consultant for a company known as the Carlyle Group.
Carlyle Group hope to grow the firm nationally and internationally.
The Carlyle Group, for instance, has $4 billion in working capital, which limits its investment to $400 million.