Trump believes that Stewart's version of The Apprentice is pulling viewers from his own show - and he's far from thrilled about it.
He tells ABC Radio, "I think there was confusion between Martha's Apprentice and mine. Mine continues to do well, and as you know, the other one has struggled severely."
Martha Stewart's Apprentice premiered last month (SEP05) to lower-than-expected ratings, and has continued to struggle.
Trump's Apprentice, now in its fourth season, continues to be successful, but has posted its smallest audience to date.
He adds, "I think (Stewart's show) probably hurt mine and I sort of predicted that it would, because there was a lot of confusion in the world."