Photo by: Elise Amendola

** FILE ** In this Oct. 24, 2011, file photo, Jill Stein of Lexington, Mass., speaks during a news conference outside the Statehouse in Boston. Stein, a Massachusetts doctor who ran against Mitt Romney for governor a decade ago is poised to challenge him again — this time for president as the Green Party's candidate. (AP Photo/Elise Amendola)