Donald Trump urges FBI to 'get back to the basics' after mishandling Florida shooting tip

Donald Trump has lashed out at the FBI saying the agency "missed all of the many signals" sent by the suspect in the Florida school shooting and arguing they are "spending too much time trying to prove Russian collusion with the Trump campaign".

The president, posting on Twitter, wrote: "This is not acceptable. They are spending too much time trying to prove Russian collusion with the Trump campaign - there is no collusion. Get back to the basics and make us all proud!"