Li Zhou and Vigina Majiia

 Barack Obama ,who is the 44th President of the United States of Amarica,is also the winner of the 2009 Noble Peace Prize,made history in 2008 when the U.S. presidential election ,is the first African American to be  President,


This sentence is long. It needs an "and."

 Barack Obama ,who is the 44th President of the United States of America AND also the winner of the 2009 Noble Peace Prize, made history in 2008


After "when" it needs a new subject "he"  and a new verb "won"


 Barack Obama ,who is the 44th President of the United States of America AND also the winner of the 2009 Noble Peace Prize, made history in 2008 when HE WON the U.S. presidential election ,is the first African American to be  President.


But this still isn't correct. The end (is the first African America to be President" can move to the middle. Then you will have 3 actions connected by the AND.

(who-action 1- is the 44th President of the United States, -action 2- the first African American to be president AND-action 3- also the winner of the 2009 Nobel Peace Prize)

The correct complete sentence is:

Barack Obama, who is the 44th President of the United States, the first African American to be President and the winner of the 2009 Nobel Peace Prize, made history in 2008 when he won the U.S. presidential election.