Farrakhan spoke Wednesday on WVON radio, a black-oriented Chicago station.
He pointed specifically to derisive comments, including the "N-word," being allegedly shouted at legislators who supported Obama's health care legislation. He also pointed to rallies where signs depicted Obama as Hitler.
And the 76-year-old leader of the Chicago-based movement, which embraces black nationalism, predicts things will only get worse.
Farrakhan says Obama is in trouble.
Farrakhan has said what he calls the "white right" is conspiring to make Obama a one-term president.
Farrakhan says American needs to support Obama because he is the country's "last chance" to improve.