AMES, IA - FEBRUARY 11:  Senator Barack Obama (D-IL) (L) chats with Zoe Russell (R), Aida Villarreal-Licona (2nd-R) and her sister Sophia (3rd-R) during a press conference before for a campaign rally at Iowa State University February 11, 2007 in Ames, Iowa. All three were high school and middle school students working on a documentary about youth involvement in politics. Obama is wrapping up a two-day campaign swing through Iowa after announcing February 10, that he would seek the Democratic nomination for President. Getty Images logo Getty Images 29 months ago

AMES, IA - FEBRUARY 11: Senator Barack Obama (D-IL) (L) chats with Zoe Russell (R), Aida Villarreal-Licona (2nd-R) and her sister Sophia (3rd-R) during a press conference before for a campaign rally at Iowa State University February 11, 2007 in Ames, Iowa. All three were high school and middle school students working on a documentary about youth involvement in politics. Obama is wrapping up a two-day campaign swing through Iowa after announcing February 10, that he would seek the Democratic nomination for President.