No, Bush didn’t pick up the phone and have him cancelled. After 9/11 he made a statement that the terrorists were not cowards but Americans were for lobbying cruise missiles at them from 2,000 miles away. People were pissed at him as it was a time where people wanted to be patriotic and payback. He faced a lot of backlash for that, and Bush’s approval rating was 85% after 9/11 so advertisers started to bail on him. No advertising, then no show.
Kinda ironic as the show’s name is Politically Incorrect and a statement like the 9/11 terrorists are not cowards is very politically incorrect and by being Politically Incorrect, he got cancelled.