"I think Donald Trump's genius has been as an entertainer, as a reality show figure, who's really hacked the system.
"He finally figured out that if he gave these outrageous speeches, then cable news would cover him all the time and drown out his rivals and drown out any policy discussion. And we're seeing a continuation of that.
"People talk about Twitter. But Trump's real venue is television and he's a sort of sinister Chauncey Gardner, from the novelÂ Being There. There's this figure who watches TV, repeats what he sees on TV, and becomes popular, even though he knows nothing."