Rep. Issa, ex-EPA chief Jackson to square off over email allegations

Republicans and conservative activists have attacked Jackson’s use of a secondary EPA address under the name “Richard Windsor.”

But the EPA and agency defenders note that EPA administrators under GOP and Democratic presidents have used secondary accounts, and that the correspondence can be obtained in records requests.

EPA documents released to the conservative Competitive Enterprise Institute also show that Jackson in late 2009 asked an official with Siemens Corp. to use Jackson's home email address when trying to contact her directly, according to several news accounts.

Jackson has denied any wrongdoing.

“Lisa Jackson has been a dedicated public servant who served her country honorably for over two decades. She has engaged in no wrongdoing of any kind. She is committed to responding appropriately to any inquiry initiated by any forum,” Coburn said last month when confirming Jackson had retained him.

The Sept. 10 witness list circulated Thursday also includes Gary Gensler, who is the current chairman of the Commodity Futures Trading Commission, and Jonathan Silver, the former head of the Energy Department’s green energy loan programs office, among other witnesses.