Islamic extremists al-Shabab brand Donald Trump 'brainless billionaire'

Somalia-based Islamic extremists al-Shabab have mocked US president Donald Trump in a new video that calls him a "brainless billionaire" as his administration steps up military efforts against the group.

The new video said US voters elected "arguably the most stupid president a country could ever have" and said Mr Trump is "making the United States the greatest joke on earth and is now propelling it further to its eventual defeat and destruction".