Dr. Jill Stein

The Green Party nominated a Massachusetts physician and a formerly homeless single mother as their presidential and vice-presidential candidates for 2012 on Saturday. They say they are in it to win it, and — at the very least — to expand the electoral conversation to include people they say aren't represented by either Democrats or Republicans.

Amid waving green and white campaign signs in a conference room at a Baltimore Holiday Inn, the room erupted in cheers as Dr. Jill Stein won the delegate count.