Did EPA Chief Lisa Jackson resign because emails she sent from a secret alias account will go public next month?

A Washington attorney suing the Environmental Protection Agency for refusing to disclose information about the creation and use of the ‘secondary’ email accounts, says the agency's chief is resigning in part because of the Justice Department's decision to publicize thousands of secret alias emails she was responsible for.

Chris Horner, a senior fellow at the Competitive Enterprise Institute, said the scrutiny over the alias emails tied to coal regulation, which will be publicly released next month, is clearly a factor behind EPA Administrator Lisa Jackson’s decision to step down.

‘Life's full of coincidences, but this is too many,’ Horner told FoxNews.com. ‘She had no choice.’