Politicians with narcissistic, psychopathic, or Machiavellian traits significantly increase political polarization among voters, finds study of over 90 prominent politicians worldwide, including Donald Trump, Jair Bolsonaro, Boris Johnson, Viktor Orbán and Silvio Berlusconi.

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3. Politicians with narcissistic, psychopathic, or Machiavellian traits significantly increase political polarization among voters, finds study of over 90 prominent politicians worldwide, including Donald Trump, Jair Bolsonaro, Boris Johnson, Viktor Orbán and Silvio Berlusconi.