Trump believes 'paranoid conspiracy theories'
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Trump wiretap claims: 'President has these paranoid conspiracy theories'

"If you're a president that's not the sort of story you usually encourage people to pay attention to."

That's the view of Matt Miller, a former Department of Justice spokesman, who told the BBC's Katty Kay that if a federal judge had granted a warrant to wiretap the Trump campaign directly it would mean there was "credible evidence" that members of his campaign were acting as "agents of a foreign power".