Trump tapping claim 'makes US a circus'
Former US defence secretary and BBC world affairs analyst William Cohen says President Donald Trump's wiretapping allegations against Barack Obama are "unpresidential" and harmful to his administration's credibility.
He adds that the US image abroad has been negatively affected by Mr Trump's unverified claims.
"I think we're seeing the US portrayed as a circus," Mr Cohen told the BBC's Katty Kay and Christian Fraser.
- From the section US & Canada