BRITAIN IS SEETHING with rumours of treason and plot. Hardcore Brexiteers speculate that Theresa May is preparing to betray the 17.4m people who voted Leave, at the behest of a Machiavellian establishment. Hard-core supporters of Jeremy Corbyn believe that the same establishment is co-ordinating a vast campaign to sabotage their hero. And a growing Yellow Jacket movement feeds on far-fetched theories of secret-service plots and police cover-ups. Richard Hofstadter, a great American historian, once posited that American politics was vulnerable to a "paranoid style" that is defined by "heated exaggeration, suspiciousness, and conspiratorial fantasy". That style has now found a home in Britain.
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