George Zimmerman -- I'm a Scapegoat for Obama

George Zimmerman says he was screwed over by the U.S. government and President Obama himself ... and blames them for his prosecution.

An unapologetic Zimmerman appeared on CNN's New Day, revealing he'd like to become a lawyer so he could stop miscarriages of justice -- like the one through which he suffered.

Zimmerman groused that 2 law enforcement agencies determined he acted in self-defense in the death of Trayvon Martin, yet people still tried to nail him to the cross.