Former CIA Head John Brennan: Trump's Presidency Has Given Russia Everything It's Wanted

Former CIA Head John Brennan: Trump's Presidency Has Given Russia Everything It's Wanted

Former CIA director John Brennan had a fraught relationship with US President Donald Trump, and now he remains one of Trump's sharpest critics.

In his new memoir, 'Undaunted, Brennan told Business Insider what he feels is the biggest threat to the November election: President Trump himself.

Brennan says the Trump administration and campaign's 'dishonesty' and disinformation is just as dangerous as foreign interference in the election.