Simplify the following text for a Grade 9 native English-speaking person.
Original: Cynthia McKinney ( born March 17 , 1955 in Atlanta , USA ) is an American politician and was the 2008 presidential candidate for the Green Party .
Simplified: Cynthia Ann McKinney ( born March 17 , 1955 ) is a former US Congresswoman and a member of the Green Party since 2007 .