In an interview with the Orlando Sentinel, Zimmerman criticized Obama for saying if he had a son, he'd look like Martin.
Zimmerman called the comment incendiary and also blasted the president for directing the U.S. Justice Department to pursue what he called a baseless prosecution.
The Sentinel reported that Zimmerman referred to the president as Barack Hussein Obama.
A Florida jury acquitted Zimmerman of manslaughter in the 2013 death of Martin.